Tr-3650 syncros repair. - Ford Mustang Forum
 
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post #1 of 5 (permalink) Old 01-05-2014 Thread Starter
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Tr-3650 syncros repair.

Whats up guys i have a 2002 mustang gt. I recently installed my rear end gears (3.73) and the car was running good until it started to grind a little everytime i shifted into 3rd gear! And now it started grinding into 4th as well so i think its time to fix it! Im not a pro at this these things but i know the basics on mechanic work. I replaced a few things myself like a clutch job.I was just wondering how hard it is to replace the synchros or if i need any special tools? Thanks in advance to you all


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post #2 of 5 (permalink) Old 01-05-2014
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Originally Posted by Stevo_sikkstang View Post
Whats up guys i have a 2002 mustang gt. I recently installed my rear end gears (3.73) and the car was running good until it started to grind a little everytime i shifted into 3rd gear! And now it started grinding into 4th as well so i think its time to fix it! Im not a pro at this these things but i know the basics on mechanic work. I replaced a few things myself like a clutch job.I was just wondering how hard it is to replace the synchros or if i need any special tools? Thanks in advance to you all
The TR3650 isn't all that easy but an inexperienced person with patience and good mechanical skills can do it.

The 3, 4 and 5 rings are not so hard to access once you get the main case apart. The 1, 2, and reverse rings require some good gear pullers and a press to get it all back together.

Depending on how much scraping has been going on you may need a new third gear, a 3-4 synchro slider assembly, and maybe a new input shaft (AKA Fourth gear).

If the car has really low miles on it and the 3 and 4 synchros both went out prematurely, you may have a warped 3-4 fork. Otherwise, the third gear ring tends to simply wear out first.


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post #3 of 5 (permalink) Old 01-07-2014 Thread Starter
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Thanks for the reply and well im going to open it up and see if its a job i can do. Do i need a gear puller to change 3rd and 4th gear? Ive been running the car with this issue for about 2 months or so im almost sure im just going to have to replace all the syncros & 3rd gear


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post #4 of 5 (permalink) Old 01-07-2014
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Thanks for the reply and well i'm going to open it up and see if its a job i can do. Do i need a gear puller to change 3rd and 4th gear? I've been running the car with this issue for about 2 months or so i'm almost sure i'm just going to have to replace all the syncros & 3rd gear
The third gear stuff comes off the main shaft without a puller. You will need a pair of expanding pliers "Lock-Ring" pliers. (Not Snap-Ring Pliers)

You may need something to pull the fifth gear cone from the rear of the counter shaft to get it apart. You have to disassemble the entire tail section to remove the main case so that you can access the input shaft (aka fourth gear) and the third gear stuff.

Gears 1,2, and Reverse on the main shaft (plus that little fifth gear) will need a pulling arrangement to get them off the main shaft if you plan to access those synchro rings.

You might consider upgrading the fork pads for 1-2 and 3-4 to the custom billet bronze pads, or at least replace them while you are in there. The plastic ones don't last all that long...

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post #5 of 5 (permalink) Old 01-08-2014 Thread Starter
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Yeah thats what a few buddies were telling me they recommend i put the bullit internals im going to go ahead and take a look at it then thanks alot for your help


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