Fox T5 Rebuild Or Swap

A Tremec 3550/TKO/TKO 500/TKO 600 is a completely different transmission from a T5. Strong and almost bulletproof unless you run them without proper lubricant or full throttle shift without the clutch.

A Tremec T5 is still the same T5 that is prone to self destruction when used in a street/strip or racing environment


T5, all versions used in 5.0 Mustangs


Tremec 3550/TKO /TKO500/TKO600 AFTERMARKET replacement for T5 - handles racing environments with ease

See http://www.ttcautomotive.com/English/products/tremec.asp for more information - check out the "Light Duty" group, since TTC makes monster transmissions for big trucks as well as passenger cars.


T5 identifier information.

On the tail shaft of the transmission, there will be a stamped aluminum tag. The tag will have a number on it that you can cross reference to the chart below. There is no other way to find out what type of T5 it is without disassembling it. All the rest of the numbers on the outside of the T5 case are part numbers which are not unique to any particular T5 model.

Remember that 94 - 97 T5's have a longer input shaft (about 11/16” longer) and can only be used with a 94-95 bell housing unless you modify or replace the input shaft.

T5's used with a 4 cylinder have a 3.93 first gear, reduced torque ratings and an input shaft pilot diameter that is smaller that the T5 used for V6 & V8 engines. The pilot diameter is .59" compared to the .668" used on V6 & V8 T5's. It requires a different pilot bearing to be used with a V6 or V8. The pilot bearing you need is for a Ford Ranger diesel from AutoZone part #14672




I don't know how you feel about the DYI thing when it comes to gears, some people don't like the idea of working on transmissions. If the DYI transmission fix idea isn't something that you would rather leave to someone else, here are some resources:

See http://www.ttcautomotive.com/English/onlineorder/product.asp to download a FREE service manual for T5 or Tremec 3550/TKO
You will need the Adobe Acrobat viewer which is also a free download – http://get.adobe.com/reader/

See http://www.hanlonmotorsports.com/ or http://www.ddperformance.com for parts

A T5 rebuild kit with syncros, bearings and other small parts costs about $250-$350. It does not include any gears or shafts.

http://www.hanlonmotorsports.com/ also has a video on how to rebuild your T5 or Tremec. It costs about $20, and is worth every penny of it.

I did a Tremec 3550 rebuild, and it wasn't that difficult. The video was an immense help, and I would recommend viewing it. At $20, it will give you an opportunity to look and decide for yourself if you think that it is something you want to try to do.

Alternate sources for the T5 rebuild video...
https://www.google.com/search?sourc...30j0i22i30.0.0.0.9710...........0.Mz886XmDDt4


T5 Shim kits – best product I have seen in a while… http://www.5speeds.com/t5/shims.html
“The Peel ‘n Place T5 World Class shim kit makes shimming T5 counter gear and main drive gears very easy.”

Just rebuild it IMO

When I rebuilt mine it cost about 2 grand with a new clutch, fly wheel, and firewall adjuster.

You can rebuild it if you feel inclined. It's a very tedious process but it's not overly difficult with some research and patience. If you can find another to swap in that's not a bad choice either. I've swapped in used transmissions with good success. The rub is you could potentially grab a unit that has issues of its own.

I would budget a grand for a new transmission, clutch, or flywheel and that's assuming you find a hell of a deal.

In my area that was the best deal I could find. But for not too much more I should of just upgraded.

The country boy would simply buy the 3 and 4 synchos and change them only, maybe whatever else is on the mainshaft that has to be removed to get to them. I did this to the S10 four banger T5 that I used as a guinea pig for my Chevelle stick conversion. For that trans, the new countershaft was $110 and the rebuild kit with all the synchos, bearings, etc was $130. It was a nwc unit, but pretty cheap to get running. I was lazy and did not change the ones that were not grinding. Gave the rebuild kit to the guy who bought it. I went TKO 600 in that car. Last months T5 swap into my 2.3 is unhappy about the 3 rd gear shift, so one day I may have to change that. Stuff on the mainshaft is easy, pulling the counter shaft is somewhat more painful.

I had a positive experience with a guy that was selling rebuilt T5's on ebay 5 or so years ago, I can't find any listing on ebay but here is/was his contact info below. I paid $700 for a rebuilt WC T5 and got $100 back for a usable WC core.

Anthony DelRoss
spraystang@yahoo.com

Anthony Delross Streetcarz Performance Products
209 east Label unit/B Marshall,Mo.65340 660-229-0725