Complete Transmission Overhaul Kit (4-134 engine)
Fits 46-71 Jeep & Willys with T-90 Transmission

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Complete Transmission Overhaul Kit (4-134 engine)
Fits 46-71 Jeep & Willys with T-90 Transmission
Complete Transmission Overhaul Kit

Everything you need to completely redo your entire transmission. Just keep your old case. Kit includes all New gears, shafts, bearings, gaskets, seals, synchronizer, snap rings, thrust washers, & roller bearings. The most complete kit available and highest quality parts guarantee.

T-90 Transmission with 4-134 engine

46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
50-52 M38
52-66 M38A1
46-53 Truck
46-53 Station Wagon
Item # Price

Availability: In stock

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Questions: What is the number of teeth on the input shaft gear and the mating cluster gear for this kit? Is the input bearing sealed? Can it be ordered as a sealed bearing? Thanks Milo
Question By: milo on Jan 5 2021 6:16 PM
Give me a call toll free and we can help. You can ask for Mike M. We can swap it for you to what you need.
Answer By: Willys Jeep Parts Tech on Jan 5 2021 12:10 PM
Questions: Will this kit work for a dauntless v6?
Question By: Ethan on Jun 18 2020 6:20 PM
As long as you have the T90 transmission yes.
Answer By: Willys Jeep Parts Tech on Jun 18 2020 11:59 AM
Questions: Is it OK to use Mobil 1 synthetic gear lube for a T90. I know there is a problem with extreme pressure additives and the copper containing brass parts but the Mobil website says that Mobil 1 synthetic is compatible with copper. Can you clear up this confusion.
Question By: David P. Sweet on Jun 7 2020 6:12 PM
We recommend non mineral, GL4 90 weight. A brand name to look for is Brad Penn 85/90. Thanks
Answer By: Willys Jeep Parts Tech on Jun 7 2020 5:05 PM
Questions: I have a T86AA trans in a 1967 cj5. Can I rebuild it as a T90 with this kit? Its going with a V6 Buick motor.
Question By: Fred on Jan 7 2020 1:38 AM
We should be able to help you with that T86. Please call us toll free and ask for Mike M.
Answer By: Willys Jeep Parts Tech on Jan 7 2020 6:10 AM
Questions: Dose this kit have the oil collector with it that is held in place by two bolts to the front of the case
Question By: Luke on Jan 10 2018 5:48 AM
The oil collector is available used only. Please call us toll free and we can try to help.
Answer By: Willys Jeep Parts Tech on Jan 10 2018 5:57 AM
Questions: I have an m38a1 transmission locked in neutral- cannot get it to go in any gear. Have the top off the transmission- Question , the forks : large one will freely move left and right foreword and back- small fork will move left and right but not forward and back, is this the way it works or do I have a problem with the small fork ? Thanks
Question By: De Alvin Martin on Jun 9 2017 4:50 PM
Sounds like you have an issue with your small fork. Call us toll free and we can put you in touch with our transmission guy.
Answer By: Willys Jeep Parts Tech on Jun 12 2017 5:38 AM
Questions: I have an early 46 cj2a with three on the tree t-90a will this kit work to rebuild the transmission?
Question By: Troy Church on May 30 2017 12:53 PM
Yes, this kit will work for you. Thanks!
Answer By: Willys Jeep Parts Tech on May 30 2017 9:17 AM
Questions: What is the diameter of the main input shaft for my T90?? Also, it has 10 splines, correct?
Question By: Scott Z on Apr 24 2017 6:31 PM
Approx 1.125 like original. Yes, they are 10 spline.
Answer By: Willys Jeep Parts Tech on Apr 24 2017 1:07 PM
Questions: what is the weight of this kit, as i need to hand carry it by air
Question By: Gustav Erne on Nov 20 2016 2:33 AM
These weigh approx. 45 pounds boxed.
Answer By: Willys Jeep Parts Tech on Nov 21 2016 5:42 AM
Questions: will this kit work for the L 6 226 in a 1957 willys pickup
Question By: Anonymous on May 12 2015 12:00 AM
You want part number: T90K-L
Answer By: Willys Tech on May 12 2015 12:00 AM
Questions: Does this kit include the parts to rebuild the cover (poppet balls and springs, forks)? The cover was different in military vehicles and CJ vehicles.
Question By: Jayke on Nov 20 2014 12:00 AM
This is for the transmission only. It does not cover the top shifter.
Answer By: Willys Tech on Nov 21 2014 12:00 AM
Questions: I'm rebuilding a T90 for a 1953 M38A1, When I start adding up seterate parts it adds up. Will this Kit cover everything but the case and the cover/shifter?
Question By: Anonymous on Sep 4 2013 12:00 AM
Yes that is correct. It is a complete transmision assembly.
Answer By: Willys Tech on Sep 4 2013 12:00 AM
Questions: Does the complete transmision kit come with instructions?
Question By: Charles Bauer on Jun 13 2012 12:00 AM
We sell complete mechanics manuals. That is one of the first things you will want to get for you Willys. They go thru all the disassembly and assembly for the vehicle.
Answer By: Willys Tech on Jun 14 2012 12:00 AM
Questions: I know you are going to say rebuild, but i just would like to know why this t90 jumps out of second gear when decelerating at low speeds. This is the second trans, the first had a lot of water damage from seting but this one looked great. Replaced a few bearings and put everything back like came out. After 5 or6 hundred miles starting to jump out of gear. Whats not right or worn out?
Question By: Lyle on Aug 22 2011 12:00 AM
It is your syncronizer assembly. Try part number: 640391
Answer By: Willys Tech on Aug 23 2011 12:00 AM
Questions: I have 1943 willys mb. Is it possible to use same engine the four cylinder and some how install and make it automatic with some type of adaptor between engine and transmission? or do i have to change engine or give me an idea maybe you have something i can use.\, to do the change over.
Question By: Chuy on Mar 25 2011 12:00 AM
I would advise against this. You will destroy the value of the vehicle getting rid of the original T84 transmission.
Answer By: Willys Tech on Mar 28 2011 12:00 AM
Questions: I'm looking at purchasing a used T-90 for my Cj2a, but it has the longer main drive gear (shaft) for a V-6/V-8, and I am using an original F-134 engine. What parts would I need to buy to swap this out, other than the drive shaft itself? Also, would this require a complete tear-out/trans re-build or removal of the main shaft to do this?
Question By: Tim on Apr 27 2016 8:00 PM
You probably need a main drive gear out of a 6-226 T90. Please call us toll free and we can help you out.
Answer By: Willys tech on May 2 2016 5:39 AM