Transmissions and Drivetrain Need help with your trans? Problems with your axle?

T5 question

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Old Dec 19, 2009 | 01:51 PM
  #1  
305forever's Avatar
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From: nazareth pa
Car: 98 blazer 4x4 lifted 3inches
Engine: 4.3
Transmission: auto
Axle/Gears: idk, but not a posi
T5 question

So, i found a T5 for my trans swap, i am selling the th350 with swap kit btw, but the t5 is from a v6 rs and my buddy told me it would be worthless behind a 350 because its different than a v8 t5 is this true i just want to make sure because its only 200 bucks
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Old Dec 19, 2009 | 02:35 PM
  #2  
pound's Avatar
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From: Beautiful Coastal New Jersey
Car: 1990 Firebird
Engine: 350 TBI
Transmission: T5
Axle/Gears: Auburn posi 3.73
Re: T5 question

Yes its true. The V6 T5 has a different spline count on the input shaft than the V8 T5.
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Old Dec 19, 2009 | 02:57 PM
  #3  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: T5 question

Run from it like your pants are on fire. If anything find an 88+ world class. I run a non-WC behind my 350 and it's held up well, but I don't rod the car either.

JamesC
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Old Dec 19, 2009 | 03:18 PM
  #4  
305forever's Avatar
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From: nazareth pa
Car: 98 blazer 4x4 lifted 3inches
Engine: 4.3
Transmission: auto
Axle/Gears: idk, but not a posi
Re: T5 question

whats the worst that can happen with a v6 t5
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Old Dec 19, 2009 | 03:23 PM
  #5  
pound's Avatar
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Posts: 276
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From: Beautiful Coastal New Jersey
Car: 1990 Firebird
Engine: 350 TBI
Transmission: T5
Axle/Gears: Auburn posi 3.73
Re: T5 question

Originally Posted by 305forever
whats the worst that can happen with a v6 t5
Actually buying one.
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Old Dec 19, 2009 | 03:31 PM
  #6  
Gumby's Avatar
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Joined: Oct 2001
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Re: T5 question

Originally Posted by 305forever
So, i found a T5 for my trans swap, i am selling the th350 with swap kit btw, but the t5 is from a v6 rs and my buddy told me it would be worthless behind a 350 because its different than a v8 t5 is this true i just want to make sure because its only 200 bucks
only $200 isn't a good deal. $100 is a good deal.

input shaft is different but thats it.

If you know how to drive a regular T5 can last.

You can find guys with built 400s drag racing on a regular T5 with no problems and you can find guy with bone stock 305s that can trash a T5 daily.

speed shifting is the first no no
30in wide meats & 5k rpm drops are a no no too.

But get a WC if you can find one.
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Old Dec 19, 2009 | 06:08 PM
  #7  
305forever's Avatar
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From: nazareth pa
Car: 98 blazer 4x4 lifted 3inches
Engine: 4.3
Transmission: auto
Axle/Gears: idk, but not a posi
Re: T5 question

thanks for all the help ill tell him i wont be needing it
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Old Dec 20, 2009 | 07:48 PM
  #8  
1MeanZ's Avatar
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From: North Central Indiana
Car: 86 IROC
Engine: 383
Transmission: TKO 600
Axle/Gears: 3.54 Dana 44 IRS
Re: T5 question

Originally Posted by 305forever
thanks for all the help ill tell him i wont be needing it
Also the V6 T5 has a really low 1st gear that the V8 models dont have. I'm using a T5 from a 4.3 powered S10 in my Trans Am. It has a lower 1st gear but I don't know if its as low as the V6 F-body unit. My TA used to be an automatic so it has 2.73 gears, the lower 1st gear works well with the 2.73 gear.
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Old Dec 21, 2009 | 08:22 AM
  #9  
firechicken_3's Avatar
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From: Clinton, IA usa
Car: 1984 Firebird
Engine: 350 Terminator EFI
Transmission: T56
Axle/Gears: 4.10
Re: T5 question

the spline count difference is really a moot point as a correct 10.5in sized and 14 splined disc is availible from mcloed to mate the v6 trans to a v8 pp/fw, i had one for a while it worked nice, but the low 1st gear and my 3.73 made it a ***** to drive at times, i later found a v8 trans with better 1st and overdrive ratios.

i also just used the dinky 9 inch v6 disc inside the v8 size pressureplate/flywheel... not for long enough to know durability tho
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Old Dec 21, 2009 | 02:21 PM
  #10  
Gumby's Avatar
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Posts: 8,113
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Re: T5 question

1st in a V6 T5 is useless for typical driving unless you wanna get moving quick
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Old Dec 22, 2009 | 04:18 PM
  #11  
305forever's Avatar
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Joined: Mar 2009
Posts: 51
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From: nazareth pa
Car: 98 blazer 4x4 lifted 3inches
Engine: 4.3
Transmission: auto
Axle/Gears: idk, but not a posi
Re: T5 question

hmm good thing i didnt get it cuz the car is for sale
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