Tremec tranny install now its slow

gt40p

New Member
Aug 12, 2009
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picked up a world class tremec for dirt cheep brand new it use to be able to blow the tires off through second now it will only chirp
1 2.95, 2 1.94, 3 1.34, 4 1.1, 5 .63
i know that the gears are lower than the stock ones didnt think it would be that much of a difference
SO what diff gear for the rear still the 308 back their
 
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If that is truely the gearing you have in the trans, you can use 4.10's for normal driving.
When i went to the 600, the long first bugged me, if you have a ton of power it's not a big deal, but if you are under 400rwhp it feels way too long.
a .63 overdrive leaves you at a pretty low rpm, that's why you could get away with the 4.10's.

I was going to go the 4.10 route over 3.73's, but i've decided to just add a few more hundred hp instead.
 
stock bottom end gt40p set up p$p .040 sheved ect.,got to re gear it dont have 200 more hp in the buget yet the 1st is a big difference then the stock t5, i put the tranny in whan the motor was all stock it was a dog!!!!!
 
I know my 87GT with H/C/I 3.55's spins in 1st and 2nd with my TKO and that's with an aluminum flywheel. My cousins stock H/C/I aluminum flywheel 89GT doesn't light them up but it does hook and go 3.08's (also TKO).
 
I ran 4.10's in my old 89 with a T5-Z that has a .64 5th and it cruised on the highway easily. If you arn't planning on boosting the car later I would put 4.10's in it.
 
Is there something I'm not getting here? All 87-93 mustangs came with a "world class" t-5 with a 3.35 first gear. If you did infact swap it out with another "world class" t-5, nothing should have changed.


You are right. All Mustangs since 1985 have used the WC T-5....5.0, 2.3L, 3.8L and the new 4.0 V6 use a World Class T-5.

The Z-spec T-5 is the 2.95 geared T-5. A lot of guys call it the WC t-5 incorrectly.

Also, Tremec is a brand. There are 8 Tremec transmissions for the Mustang
 
Yeah thats gonna happen with that tko. The TKO WILL eat close to about 20 hp over a a regular t5 and that is proven on dynos. They are heavier and beefier of course. Before I installed my TKO, i installed 3:73's. Now you need a more mods just to make up for it.
 
it is a t-5 its a tremic brand got it with alot of other parts i dont know whare the guy bought it from he said he paid 1400 for it, not from a factory car it came with a gold short shifter on it
the #'s i pulled off it were
13-52-065-922
13-52-66-939
13 52 251 07505