'89 and up Mustangs came with World Class T-5's?
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maverick0716
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25thmustang
Mustang Master
Yes but I believe in 1989 at some point (date on transmission) the gears in the tranny were beefed up.
Actually the aftermarket T-5's true designation is either "Heavy Duty" or 7003-Z. They are both the same tranny (now manufactured by Tremec and sold by Ford Racing under the 7003-Z number), and are both stronger than any T-5 that came in any year Mustang. It is correct that the World Class T-5's are stronger than earlier T-5's but they are not as strong as the Heavy-Duty/Z T-5.
"World Class" is simply Ford's designation for the upgraded T-5 that they spec'd to Borg Warner, the original manufacturer of the T-5. In other words, you can find a "World Class" T-5 at a junk yard, but the best T-5 (H.D./Z) is only available new. The easiest way to identify a HD/Z T-5 is by the 2.95 ratio on 1st gear (the later model v8 Fox body t-5's came w/ 3.35 1st gears), that's the one you want if you call a shop, regardless of whether they get it from Ford Racing or directly from Tremec.
"World Class" is simply Ford's designation for the upgraded T-5 that they spec'd to Borg Warner, the original manufacturer of the T-5. In other words, you can find a "World Class" T-5 at a junk yard, but the best T-5 (H.D./Z) is only available new. The easiest way to identify a HD/Z T-5 is by the 2.95 ratio on 1st gear (the later model v8 Fox body t-5's came w/ 3.35 1st gears), that's the one you want if you call a shop, regardless of whether they get it from Ford Racing or directly from Tremec.
89MustangGX
I have nothing productive to add!
2001droptizzy said:
Yes...changed the gearset to the 2.95 first in that year - it is not just limited to non-OEM pieces.
83-84 Non WC T-5. These do not have roller bearings for the countershaft and no caged needle bearings under the gears. They still make non WC T-5's for wimpy applications (cheaper) these had 2.95 first
85-89 First series WC-T5 These had the 3.35 first, and all the good WC upgrades 7 tooth speedo gear. 265 ft lb rating
90-93 upgraded model, WC-t-5 carbon blocker rings, improved gear alloys. 8 tooth speedo gear, 300 ft lb rating.
93 Cobra, same as 93 T-5 but caged tapered bearing between input and output shaft. Steel throwout bearing retainer. 310 ft lbs
94-95 WC-t-5 Same as 90 - 93 model, but longer input shaft. 300 ft lbs
94-95 Cobra 310 foot lb rating. similar to 93 cobra but with longer input shaft
T-5 Z same as 93 cobra but with 2.95 first gear Most have entire input shaft collar steel not just T/o bearing tube. 330 ft lb rating. Aftermarket only
I may be off in some details but this is pretty close.
85-89 First series WC-T5 These had the 3.35 first, and all the good WC upgrades 7 tooth speedo gear. 265 ft lb rating
90-93 upgraded model, WC-t-5 carbon blocker rings, improved gear alloys. 8 tooth speedo gear, 300 ft lb rating.
93 Cobra, same as 93 T-5 but caged tapered bearing between input and output shaft. Steel throwout bearing retainer. 310 ft lbs
94-95 WC-t-5 Same as 90 - 93 model, but longer input shaft. 300 ft lbs
94-95 Cobra 310 foot lb rating. similar to 93 cobra but with longer input shaft
T-5 Z same as 93 cobra but with 2.95 first gear Most have entire input shaft collar steel not just T/o bearing tube. 330 ft lb rating. Aftermarket only
I may be off in some details but this is pretty close.
89MustangGX
I have nothing productive to add!
jetuomi said:my 94 still has a 3.35 gear..
Someone went through alot of trouble to put an older, weaker tranny in there.
Michael Yount
Mustang Master
What are the remaining gear ratios in the 2.95 first T-5Z's? Still 1.93:1-2, 1.29:1-3, 1:1-4, .675-1-5? Thanks in advance!
89MustangGX
I have nothing productive to add!
Michael Yount said:
Only the 1st gear ratio changed AFAIK, and I also have only ever seen a .67 5th, never referred to as a .675?
Michael Yount
Mustang Master
Funny - I've only seen 5th referred to as .68, and just recently saw a data sheet that referred to it as .675. Oh well, .67, .675, .68 -- anyone one of those are close enough I suppose. 
RyanSG
Founding Member
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