Hey i was wonderin because i was lookin through other posts and saw some people mentioning that the 5 speeds they put in the Z28s wouldnt be able to hanlde the power of a 350? that would mean it couldnt handle the power of the 355 im gonna swap in either right? if so this is a BIG prob... What can i do then that wouldnt cost much since my 5 spd would be worthless??

 

well more cubic inches doesn't mean you have more power, but most likely you do. it is correct gm didn't think the t5 or wc t5 could stand up to the l98 power.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

Well then if my T5 wont be able to handle it... then what do i do?? if there a kitt i can get to rebuild it to make it stronger or do i upgrade it?

 

no speed shifts. as long as you have a WC five speed it will last a while. mine did break, though. look at my sig to see the punishment mine took.

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1991 Firebird
350 L98 (was a 305 TBI),T-5,Edelbrock TES and cat back,Accel manifold
NOS,subframes,jegster torque arm,MSD Digital 6
AFPR,Lakewood lcas
Hurst linelock,SLP cam (206 212 .480 .486),relocated battery,cold air,Hypertech chip,centerforce df,clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
autopower rollbar

12.33 @ 114.83 juiced uncorrected

13.510 @ 102 non juiced uncorrected

 

I broke my T5 with my modded 305 L69.

I was pretty rough on it tho, sometimes you just gotta bang gears!

If you're easy on it, it will work for a while but i recommend a T56.

 

Mine handles the power, but I've already had to replace 2nd and 3rd gear, and their synchros. There really isnt anything you can do to beef up a T5. If you've got a 83-87 T5, try and find an 88-92, as the world class version is stronger. As long as you dont use slicks or power shift, it should last for a while. Abuse is what kills it, not regular driving.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH (2.10 60')
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

Ditto, as long as you don't abuse it, it will hold up for a while.I also destroyed a WC T5 with a stock TBI 305,so they're pretty weak.I replaced the syncros,a fork,2nd and 3rd gear,but I don't expect it to last long behind a 350.
There's no reasonable way to make this trans any stronger,it's a waste of money.Save you're money for a better trans.Most are switching to T56 (six-speed) or Tremec (five speed).As long as you're running a T5 behind a 350, just refrain from banging 2nd gear,and try not to snap the clutch too hard.I, for one, am not able to control these impulses.If you're like me,swap out a stronger trans as soon as possible!
-Rich-

 

Mine is handling quite well with 118k miles on it and many 12 second passes. As Kevin mentioned above, no power shifting and no clutch dumping on slicks. I shift fast but I do let off the gas in b/w and I don't use slicks.



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David Tuschhoff
1991 RS/Z28 Camaro
FI 355ci NA SBC V8 M5.
12.47 @ 110.7mph 1.80 60'
Best mph of 111.6.
My f-body page!

 

I really don't know how you blow a t-5 with a 305 TBI. The t-5 is weak but stock 305s are weaker.

 

JFYI: tremec makes the t5, t56, t45(I think that's what's in the mustang cobra), and what ever tranny is in the Viper (may be a t56). You're probably talking about the tremec 3550 tko. I just thought I'd let you know.