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Transmission Synchronizer Assembly
Fits 46-71 Jeep & Willys with T-90 Transmission

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Transmission Synchronizer Assembly
Fits 46-71 Jeep & Willys with T-90 Transmission
New Transmission Synchronizer Assembly (1 required per vehicle)

Comes complete with brass blocking rings, shift plates and springs.

Application:
T-90 Transmission

Fits:
46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
50-52 M38
52-66 M38A1
46-64 Truck
46-64 Station Wagon
Item # Price
640391
$69.99

Availability: In stock

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Questions & Answers

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Questions: What transmission should be in a 71 jeep cj5 with a225 biuck eng.
Question By: Anonymous on Mar 3 2015 12:00 AM
They typically used the T86AA, T14 or T90 transmissions.
Answer By: Willys Tech on Mar 4 2015 12:00 AM
Questions: I have a71 cj5 with a225 buick en. It keeps tearing out 3rd gear Y thanks
Question By: GORDON on Mar 3 2015 12:00 AM
If you have the T90 transmission in there the synchronizer is a good place to start. I would also check out your poppet balls and springs.
Answer By: Willys Tech on Mar 4 2015 12:00 AM
Questions: I am looking at a 1948 CJ-2A with the T-90 Transmission to buy but it will not shift into third gear. Took the shifter off to inspect the gears and everything looks OK with the gears and synchronizer. Could the synchronizer be bad or is there something else to look at. It shifts fine in the other gears.
Question By: Henry on Sep 16 2014 12:00 AM
I would inspect your sycronizer closer. I would also look at any excessive wear and make sure any needle bearings havent dropped.
Answer By: Willys Tech on Sep 16 2014 12:00 AM
Questions: I have a T-90 transition in my 46 willy There was a clicking noise in the tranny I removed the top and found the shift plates had came out of the synchronizer assembly what causes this.
Question By: steve on Aug 19 2014 12:00 AM
Sounds like your schronizer is very badley worn and your brass blocking ring is done.
Answer By: Willys Tech on Aug 19 2014 12:00 AM
Questions: Mine is now popping out of 3rd gear, same question, will this assembly solve 3rd too?
Question By: Anonymous on Aug 10 2014 12:00 AM
The sycronizer may be the problem but you may need to check your poppet balls and springs.
Answer By: Willys Tech on Aug 11 2014 12:00 AM
Questions: Was driving in 1st low and herd a noise from the transmission like a bearing spinning that was dry. Now I still have first but it won't shift into 3rd. Opened up the top and don't see any visible signs could this be it..
Question By: Anonymous on Mar 23 2014 12:00 AM
Sounds like its your syncronizer if it wont shift. I would take it apart and check for damage.
Answer By: Willys Tech on Mar 24 2014 12:00 AM
Questions: Hi there. I couldn't get my t-90 to shift into second gear, opened the top, and discovered the second gear brass gear is broke in two pieces. Since I will have to tear down the tranny to fix the problem, what parts would you recommend replacing? Thanks!
Question By: chris on Mar 17 2014 12:00 AM
We have a T90BSG kit as well as they syncronizer assembly or just the brass rings if you need them. Call us toll free. We are more than happy to help out.
Answer By: Willys Tech on Mar 17 2014 12:00 AM
Questions: never changed third gear syncrolize before is it farely easy?
Question By: rodney on Mar 16 2014 12:00 AM
We do sell mechanics manual that will walk you thru the process.
Answer By: Willys Tech on Mar 17 2014 12:00 AM
Questions: I have a 1971 cj5 with a t90 3 speed. The problem is is that everytime I shift I have to let the motor idle down b4 I can shift. The other problem is is that i can't shift from 2nd gear to 1st with out being almost stopped. Do I needa redo my tranny?
Question By: Luke on Sep 28 2013 12:00 AM
Your 1st and 2nd speed gear are not syncronized. You have to come to a complete stop when shifting from 2nd to 1st or you will grind gears.
Answer By: Willys Tech on Sep 30 2013 12:00 AM
Questions: I have a 1956 CJ5 with a 225 odd fire Daunless. I'm pretty sure the transmission is a T-90 (3 speed). My question is... I have a syncronizer assy. (new complete) from a 1966 M-274 military Mule (3 speed) transmission. It looks exactly the same as the one you guys have for sale. Same number of slots (6) for the shaft and everything. will it fit my T-90 3 speed ?
Question By: Dave Wilson on Jul 29 2013 12:00 AM
Somebody put an unoriginal engine in there so you may want to check the transmission as well. It will be stamped on the drivers side case. As long as you have a T-90 they should be the same for either.
Answer By: Willys Tech on Jul 30 2013 12:00 AM
Questions: I have a 1966 CJ5 How do I tell which transmission is in it? Model # 8305A Serial #200778.. I thought it was a T90 But some others say no way?
Question By: Joe on Feb 27 2013 12:00 AM
In 1966 it was optional to have a T90 or T86AA. It will be stamped right on the side of the transmission in the housing.
Answer By: Willys Tech on Feb 27 2013 12:00 AM
Questions: I assume this requires the motor to be pulled? Thanks, Bill
Question By: Anonymous on Jan 12 2013 12:00 AM
Not the motor no. You can just drop the transmission down to get to it.
Answer By: Willys Tech on Jan 14 2013 12:00 AM
Questions: My transmission unless i hold the shifter wants to pop back a bit out of 2nd then it makes this terrable grinding noise and i cant get it to want to shift down from 3rd to 2nd unless im going really slow i understand its a syncro issue but is this the only part i need to make things better?
Question By: Csmeron on Sep 29 2012 12:00 AM
This should probably do the trick. I would check for any excessive wear on the gears themselves too.
Answer By: Willys Tech on Oct 1 2012 12:00 AM
Questions: What causes these to go bad, and make it jump out of second gear? Hard shifting or just wear out over time? Thanks, Harry
Question By: Harry on Jun 13 2012 12:00 AM
The brass wears over time. Really any transmisison that is that old will have alot of wear. Also the springs, shift plates ect take wear.
Answer By: Willys Tech on Jun 14 2012 12:00 AM
Questions: jumps out high gear whats up
Question By: jeep freak on Feb 21 2012 12:00 AM
Its your syncronizer. This should take care of it for you.
Answer By: Willys Tech on Feb 21 2012 12:00 AM
Questions: I have to completely stop to downshift from second gear to first, is this what I need? Thank you.
Question By: Marty on Jul 2 2011 12:00 AM
The T90 is not sync'd between 2nd to 1st. You always have to come to a complete stop. This is the syncronizer between 2nd and 3rd.
Answer By: Willys Tech on Jul 5 2011 12:00 AM
Questions: I am having trouble with the transmission popping out of second gear. Will this fix it or should I look at the forks and poppet springs?
Question By: Brad on Jun 23 2011 12:00 AM
This should solve your problem.
Answer By: Willys Tech on Jun 23 2011 12:00 AM