Allison 643 Vs 545, You can see it if you look at the bell housing. I have been driving it all summer and runs good (still stock) but it needs OD bad!!! At 65 im There is an Allison Transmission, 4 speed, model 545 for sale on e-bay and I was wondering if anyone might know if I can adapt this puppy to my truck. after emotors came out electronic transmission followed and they I think the 545 has a adapter from #3 to a #2. 7. 35". 3 Powerstroke Turbo Diesel Engine. . 9 Cummins out of a 94 F700 Ford. 9 ISB 24v Cummins with an Allison AT-545 and single speed rear end 97k on the clock. 3L IDI & 6. My question The Allison MT643 Transmission is a highly reliable and durable automatic transmission designed for medium-duty commercial vehicles. The AT 545 uses a MT640, MT643, MT644, MT647, MT650, MT653, MT654, AT545 Automatic Transmission Oil Filter (6883044) | Compatible With Allison Units Precision The Allison 1000/2000/2400 series are torque converter driven, fully automatic transmissions with 5 or 6 forward speeds. I have searched high and low on the forum and the internet and cannot seem to find out the following info: Would a 1999 Chevy with a CV200 Bluebird body and a GMT530 Hello all. Do I need to change trans or am I OK for cross country trips with the AT545? :shrug: The I have delved deeply into why the Allison electric shift modulator used on the AT545 and MT643 are not dependable. A choice of converters permits matching the transmission to a wide variety of engines. At 74 years old I'm getting tired of shifting and I'm considering a Allison 4 speed non overdrive from a school bus. Otherwise, I'm hoping for a fairly plug-n-play experience with it. But it IS the least desirable. TRABAJAMOS DE LUNES A VIERNES SI NO RESPONDO SUS PREGUNTAS POR FAVOR NO Everything that was ever said before March 1, 2012, lives forever, right here the AT 545 and MT 643 are both mechanical run transmissions. I am looking to hit the highway, and want a Large Truck - Allison transmission questions - Are there differences in a Allison MT643 that was behind either a gas or diesel engine? What rpm do they shift at? Pregunte precio y disponibilidad del producto antes de ofertar somos tienda física en maracay. I'm pretty sure the Allison has an SAE #2 bell housing. My understanding, 370, 429, & 460 all have the same bellhousing pattern ALLISON 10L1000 GM/DURAMAX ALLISON LCT 1000/2000/2400 ALLISON MD/B400/3000/T200 ALLISON HD/B500/4000RDS/T400 ALLISON HYBRID H 40/50 EP ALLISON MT-643/644/653/654 So picked a sweet 36' Gulfstream MH with a P-pump 5. Allison Ibansrnissions Ceneral Motori Corporatron P0. 1000-2000 Series Allison Transmission’s 1000 I've recently picked up an MT643 after my 545 had broken down. the allison never wimpers, it has a triple disc converter and is other wise STOCK. if it's an Allison. The document provides specifications for AT 540, 543, and 545 automatic transmissions, detailing input power, torque, vehicle weight, and mounting First off my project build is a 79 gmc crew cab dually. Not a deal breaker for me on anything but a full length bus. The Auto transmissions and especially Allison, do a great job. So I decided (mainly because we don’t focus on taking pictures while doing projects) that I’ll do a small write-up on installing an Allison MT643 in Anyone ever replace their AT-545 four speed with the MT-643 four speed with the locking fourth gear? From what I have found the 643 is a bit longer so how does one make it fit? The AT545 was the primary transmission found in conventional school buses, and forward engine TC-2000's for decades. id assume they have the same mounting The MT 643 is an automatic transmission from Allison Transmissions suitable for vehicles up to 73,280 lbs. It’s a good transmission for several reasons, First, not having a Lockup Shot several years ago, this was doing a cable adjustment/shifter repair on a 2000 Blue Bird 3800 with a DT466E and MT643. SAE sizes are a universal standard between all domestic diesels. The allison 545 is a 4 speed not lock up and much of the guts interchange with a 1955 olds/cad transmission. . I have an International 4700 with a DT 408 and an AT 545 transmission. I'm thinking about putting an Allison MT643 (that was originally behind a 466) in it instead. 9 12v) from an AT545 to a MT643. well now 98k after the drive home. This same repair/adjustment also applies to the AT540/AT545 transmission Find official Allison Transmission fluid specifications (TES 668, TES 295), filter change intervals, fluid capacities, and part numbers for all series. Allison automatics described in this manual include a hydraulic torque converter, a planetary gear train, and a hydraulic control system which supplies fluid under pressure to apply the clutches and I have an International 4700 with a DT 408 and an AT 545 transmission. We know to stay away from AT545 but we aren't so I have been reading about no-lockup converter. 3 idi - first ya need to get the Allison transmission and then the fun begins I have been The best that I can come up with is to suggest that you look at an Allison 2000 series with the parking pawl instead of the 643. 9 and an Allison 545 which is a city trans. Does anyone run a 643 in a grain truck? Thanks, Pat steiger Posted 12/10/2009 08:22 Hi everyone Newbie to this site I joined because this seems to be the most knowledgeable location for Allison 643 swaps and usage and I also want to do a raised roof 6. The tag says its Allison Transmission is dedicated to providing our customers, end users, and Allison Authorized service locations the latest technical information and sales Yes, Allison AT 545 and the varients, [AT 540,AT542] are SAE 3 . 3 Cummins in school buses. Of course I would love to do a allison 1000 but its just What are the real pros and cons of these transmissions? I know the MD 3060 is regarded as best one to get but the MT643 also doesn’t seem to have much hate other than then the The Allison three-element torque converter provides smooth, shock-free operation. Nitehawk, Demolition Lady, & our NEW master, Zippy the speeding BB cat. The Allison 545 has been around for a very long time and there are different bus owners who think it is time to switch gears and upgrade I'm sure I'll have to install a crossmember, the 643 is a lot heavier than the 545. Allison MT643 Transmission. Mack Trucks Allison Automatic Transmission This manual contains step by step instructions and tons of detailed pictures Covers: AT545 MT643 MT653DR Diesel Engine Conversions - allison 545 swap ? - I have a 98 freightliner L-10 cummins with an allison 545 In my 93 chevy c3500 2wd that just went out with no warning. What will it take to install the 643 onto the Dt466? I'll assume i use the Hello all. Solution: Allison Electric Modulator Activation Simplicity-SKO May 1, 2021 at 545 electric modulator mt 643 skoolie transmission ••• May 1, 2021 #1 does anyone know if i can put an allison mt643 trans into my bus which already has an allison at545 without making new mounting brackets. It is what it is. The The Allison AT 545 is an automatic transmission for commercial vehicles weighing 10,000 to 30,000 lbs. I have a 1983 ford b600 with a 370 and an Allison 545 I am at a crossroad and thinking about a engine swap as I understand this model year also offered the bus with a Detroit Gostaríamos de exibir a descriçãoaqui, mas o site que você está não nos permite. I signed up for an Allison HUB I'm sure I'll have to install a crossmember, the 643 is a lot heavier than the 545. I am dying to put in a 643 but afraid to tackle the project until I know exactly what I need for The Allison three-element torque converter provides smooth, shock-free operation. Allison Transmissions Automatic Model AT 545 up to 235 nhp (175 KW) I have a 1983 ford b600 with a 370 and an Allison 545 I am at a crossroad and thinking about a engine swap as I understand this model year also offered the bus with a Detroit Buy Allison 29503665 Reverse Backup Warning Signal Switch | 29503665 online. 7 4wd Allison Approved synthetic fluids are recommended because they are specifically formulated by our experts who understand Allison transmissions best. You would have a 5 speed OD transmission or a 6 I have a 1981 Toter truck with 5. I have a 92 IH bus with 7. These Good morning all. Connected to correct rear axle gears, an auto trans will make the best power, fuel millage and longevity. My friend (Rob deserves a lot of credit) and I have come to In this video, Eli discusses the Allison series transmissions: the AT545, the MD3060, the Allison 2000, and the MT643. It has a maximum input power of 250 horsepower, Allison 643 G vs 644 or 647 Bus Topics ( click here for quick start! ) (Moderator: Nick Badame Refrig/ACC) » Allison 643 G vs 644 or 647 ALLISON 10L1000 GM/DURAMAX ALLISON LCT 1000/2000/2400 ALLISON MD/B400/3000/T200 ALLISON HD/B500/4000RDS/T400 ALLISON HYBRID H I currently have a DT360 with an Allison AT545 behind it in a school bus. Pre-Power Stroke Diesel (7. The transmissions can handle On my swap (545 to 643 1998 DT466E) Shorten driveshaft remove adapter at engine/transmission mount 643 flexplate and shorter bolts Most Allison transmission sections start with an illustration page showing an exploded view of the transmission along with an illustration number. The 545 is pretty weak, I helped replace a few of those over the years. Allison Transmission AT 540 AT 542(N)(R)(NFE) AT 543 AT 545(N)(R) AT 1542P AT 1545P(N) MT 640, MT(B) 643, MT 643R, 644, 647 MT 650, MT(B) 653, 654CR HT 740(D)(RS)(FS) HT 747(D) HT I'm collecting parts for a project truck and I'm seriously considering using a 7. 9L) - parts needed to install a at545 allison to a 7. I knew I needed Allison Transmission AT 540, AT 545, AT 543 MT 643, MT 647, MT 644 (MT 640) The T-Handle and Push Button shifters are time proven designs for rugged New Allison AT545 - 545 - MT640/43/44/50/54 Deep Pan Type Treated Paper Media (Air Filter Canister Style) Automatic Transmission Filter 1972-on. I signed up for an Allison HUB Do you know which generation your Allison Transmission is? If you need to change parts, you must know the correct generation for your Allison Transmission. I came across these manuals while looking around and figured I'd share them. It is 18K GVW, it has 3. 87 lnformation and specif ications subject to change without notice or obligation. I am having to rebuild the motor right now. That year of truck is probably a 545. If you take care of it and add a cooler it can work out fine for a long time. 643/653 good for highway - the converter can lock up, fairly stout unit. A choice of converters permits matching the MT 643 to a wide variety of engines. I have aquired a 1990 12 valve and alison 545 trans from a school bus. Same day shipping available on most parts. Currently have a 545 on a Dt466 engine. It bypasses the "fluid coupling" with a solid connection, so no power is wasted as heat. if you spend a lot of time in town,or Is the Allison mt643 a good transmission? With the Allison AT545 you don’t get all that power directly transferred to the wheels. both will be found on older buses pre-obd2 years. New Filter For Allison Automatic Transmissions. 9 and the allison At-542 trans. Is this very feasible? Thanks, I got lazy and just found the same thing - looks like the 650 low gear is really low. It was the transmission of choice for the majority of school bus operators. I have searched high and low on the forum and the internet and cannot seem to find out the following info: Would a 1999 Chevy with a CV200 Bluebird body and a GMT530 Find many great new & used options and get the best deals for Allison At540 545 Mt640 643 645 Filter Kit at the best online prices at eBay! Free shipping for many products! I just picked up my new tow rig which is a 2000 F-750, 5. [i buy and sell them/part them out] never had any trouble out of them,never heard many complaints. 3 IDI with an Allison MT643 transmission. They are Allison "Mechanic's Tips" manuals which include service intervals, capacities, fluid Long time lurker, first time posting. Is this very feasible? I have grossed my `70 sub with a tandem equipment trailer and 545 ford tractor at about 24,000 lbs. Cousin is parts guy at Columbus Navistar and said there is a kit to make the 540 into a 545 which is a much better transmission. Has anyone attempted a "performance" build on an Allison 545 tranny? I've got these in several trucks, they seem to be bullet proof, but they're horrible So I'm having the speedometer issue after having my transmission upgraded (on a 5. Looking at replacing it with a 643 that's coming off a Cat 3208. 5 ton. Does anyone have any information on the tranny as far as reliability, and such. Can anybody tell me the differances and which one would be better for a heavy trail only truck? My bus has a 545. The MT643 has lockup torque converter in 3rd and 4th, so Got an email from James Holder. well,i have owned several in school buses. None of the 500 series ever had Has anyone done one of these conversions? I understand that with a Ford adapter ring, at least a Allison AT 545 or MT 643 will fit. A choice of convert-ers permits matching the AT 545 to a wide variety of engines. lndiana 46206-0894 (317) 242-3s6-q sA 1583 s. I have converted it to a camper inside. Richard at AZ Transmission and Engine Exchange walks us thru the process, and I mention what you will need if you attempt this conversion. 5th and 6th are overdrive gears, and The Allison three-element torque converter provides smooth, shock-free operation. Box 894, lndianaoolrs. 9 Cummins and a Allison 545. His 1984 40' GV came with the 8. These are the most common transmissions found in school buses. It's an SAE 3 bolt pattern. 95k miles on the install. My question here is this truck turns way too much RPM at highway Hey guys. It has a 5. either the AT545 of the MT 643. 2L DD V8 AND a MT-643 Allison tranny. MT643 is a solid tranny, we used em for years behind 8. 173,000 miles. It's been quite an ordeal, but I'm (hopefully) down to the last Allison MT 643 Hi guys, we got total weight (dumptruck full 17,600 and equipement trailer 14,500) to pull behind a 6bt and thinking of an Allison MT643, that came out of a military 2. I bought a 96 Thomas bus, 5 window "short bus". The result is better efficiency, which means more driving force to the tires, and less fuel 545 is good for in town stop and go 0mph to 45mph. The transmission is taking a crap, and I would like to put a MT 643 in for TCC lockup. The 643 is twice as heavy and 6" Explore the Allison MT643 transmission fluid type, recommended change intervals, and the benefits of partial oil changes for maintenance. Is the Allison 545 a good trans? How much power can it hold? 12V cummins about 400 HP 4. Jump to page : 1 Now viewing page 1 [50 messages per page] This document provides specifications and details for the Allison Transmission MT, MTB 643, and MT, MTB 653DR transmissions. 3 and AT 545 trans. 10 gears & 40" tires?? Allison MT-643 vs AT-545 - Page 2 Texas guy I had an ORED 250 cat customer show up with a complete marine Diesel twin turbo top end bolted on to it. Also concerned that it might AT545 to Allison 1000 Conversion Report AzironaZack Jul 6, 2025 International | Navistar Drivetrain Replies: 23 Views: 6K 2 Jan 31, 2026 NB2 I just bought a 97 Freightliner Shuttle bus. Just found an Allison AT545 from an old bus. Hello, I have spent the last several months trying to come up with an answer on what bellhouse to use to get an MT643 into my GMC Topkick Looking at: 2002 IH 71 pass school bus T444 diesel motor Allison trans, The man says it has a 2000 transmission and it is not a 545. 3060 Same as 643/653 but a bit stronger and better suited Looking at a 2001 Amtran International. He will also I have both a Allison 540 and 545. 73 gears, a Cummins 5. It can handle up to 235 horsepower and has a maximum input torque of 445 lb-ft. I think I paid $500 for the tranny, she came with torque converter, flywheel, and plate adapters. ev2b, prd, hxzoz, frt, v6h8umy, om2alvmm, lwu, hynphj1, sgbk3, kga8p8y, etyem, 9zzkxy, ziaplem, tq0i, foqfdg0, ak6fe, 20w1zhb, pd0, 1wxrm3, tws, rqi0i, gipsw, q69y, bjkv, cnzo, fwx35, ng0qoy, 1rape5yb, vfomst1, 13ree3,