Tremec T5

as with anything it depends how you drive it

The 300fltb is a torque rateing derived from work on a trans dyno... Its a figure linked to the idea that if it was run at 300fllb of torque all day every day for a long period of time it would last

its designed to help a car designer decide if the trans will last the warranty period of the car and not cause a recall or massive expense in respect to money or reputation damage.
As such putting 600 fltlb through a 300ftlb rate trans is ok you just need to know that the life of the transmission will be some value shorter than if it was 300 flb

for example my motor is standard form does 280 ftlb, and it came with a 220 ftlb rated borg warner 4 speed unique to australian cars of all 3 brands...
but that same 4 speed was also used behind an E49 option 320 fltb version of the motor
and it was used behind 2bbl standard 318s
and with subtle changes behind holden and ford 6 and small v8

they last alright

t5

if you drive it no problem
if you try and punch it into gear like you were trying to pop out a headlamp with little clutch action and your right foot to the floor you will break it

if you can get it for $300 to $500 and
1) replace the input shaft and re shim (may as well get the spigot press fit with a 0.750 sleeve so it fits a mopar roller bearing spigot as well)
2) take off 5th and replace the pressed steel retainer with the steel precison one from paul at 5speeds.com and re shim using his peel and place shims to give it appox 1-2 thou preload, and you just added 50 ftlb onto the 300 or 320 your box came with.

check all gear teeth check all synchros seat but still have clearance

run a cheap chinese mustang shifter with over shift prevention lock bolts

you can enjoy superlative free way crusing with 3.7 or 3.89 rear end and take it for the odd squirt down the track with a sensible clutch slip off the line and no huge slicks

if you bung in a dana 60 drop the clutch at 5000 rpm with nice sticky tyres you will eventually make it into parts soup really dpends how light your car is how stiff yoru rear end is to turn and how you drive it

in a 1.3 or 1.4 metric tonne car i.e lighter than 80s mustang.... you have a chance
and of course lots of 80s/ 90s mustangs went racing.

if you swap to the flat cover
fit a chevy s10 tail housing
use a mopar bell on an adapter of 12-14 mm
the release bearing off a jeep on a mopar clutch arm or one form a dakota or a hemi car
the roller spigot used on a mganum motor (with the input shaft sleeved)
this trans mount 2771 Rear Transmission Mount 1Pc for chevrolet S10 83-82 RWD 1402791
ford clutch plate with your cover
ford yoke with coversion joint get the long yoke


in theory it will fit with minimal greif into a car with a 60s A body cross member. the type that takes the square mount.

this is my aim i haven't done it yet, need to put my trans back togther. but i based my conversion on the posts of a guy calling himself "cageman" who used to post here, and on various mopar sites in the 2000s/2010s
he fitted one from a chevy s10 4 cylinder (weak) in a valiant with a 318 or 340 with no cutting 1 extra hole in the cross member for the rubber mount and a bit of thumping with a hammer...
and a small 2by 2 inch hole in the middle of the tunnel ahead of the chassis member.

you have chosen a better version
and your only issue is the speedo drive to overcome. late ford is electronic pickup so the hole points direct at the output shaft not above of below.

you can spend $300 on 50c worth of electronics and get an electrioc speedo conversion box
or spend more on your s10 tail housing and get a clamp and sleeve off ebay to re site the speedo drive on the narrower part of the output shaft

here is a link to what needs to be done to a NONE world class housing off an s10 (the one with the mechanical speedo drive hole angle) to get it to fit your world class ford spec t5 with reverse brake.

Technical - T5 Transmission S10 Tail/extension

really dpends how you drive and how far off you are from buying a bigger, more cutting needed, tremec

out of all the bigger tremec transmissions an ex mopar/keisler conversion tremec 3550 fits easiest but still needs the tunnel rasied and front thin side of the chassis cross member removed.. the rib just misses the shifter box


Dave