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

T-5 swap gone bad

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Old 05-25-2018, 10:17 PM
  #51  
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: T-5 swap gone bad

Originally Posted by Ty92Z


Just some reference pics. Top flywheel is GM 14088847 removed from my all original 92 Z28. Bottom is GM 14088671 from a T5 swapped L98. Top flywheel is much lighter.
Nobody noticed that batwing weight on the top flywheel?
Edit: batwing usually refers to the weight on the flexplates.
Old 05-25-2018, 10:54 PM
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Car: 1992 Z28 1991 RS
Engine: LB9 LO3
Transmission: 5 speeds
Re: T-5 swap gone bad

Yes, the weight is on both flywheels directly across from the locating hole. It’s more obscure on the bottom flywheel because of the rust.
Old 05-26-2018, 12:18 AM
  #53  
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: T-5 swap gone bad

OH. Sorry, obscure is right, I can't see it.
Old 05-26-2018, 01:57 AM
  #54  
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Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: T-5 swap gone bad

And as you can see both are counterweighted
Old 05-26-2018, 04:19 AM
  #55  
86Z
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Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Re: T-5 swap gone bad

Originally Posted by Ty92Z
Both are for 1pc rms, so I believe either would be correct. TPI cars got the lighter flywheel and the TBI cars got heavier piece. Performance wise I would think one would prefer the lighter flywheel. I have a flywheel from an 2wd 87 Chevy truck that came with a 1pc rms sbc and a 4 speed. I will dig it out tomorrow and see if/how it’s different.
just my opinion on this....

i changed to the lighter flywheel on a clutch swap when i was running a cammed 305 and i did not like it.. no momentum on take off. went back to the heavy one
Old 05-26-2018, 08:35 AM
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Re: T-5 swap gone bad



Maybe this angle helps NoEmission84TA.
Old 05-26-2018, 08:39 AM
  #57  
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Re: T-5 swap gone bad



This is the 168t flywheel from my truck, also a 1pc rms sbc.
Old 05-26-2018, 05:57 PM
  #58  
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: T-5 swap gone bad

Originally Posted by Ty92Z


Maybe this angle helps NoEmission84TA.
Yes, now it's clear.
Old 05-26-2018, 06:10 PM
  #59  
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: T-5 swap gone bad

Originally Posted by 86Z
this is a stock replacement flywheel that i bought for my original t5 1986 over 10 years ago.
So to clarify, this is the flywheel heavyduty needs, correct? p/n 14088671 N
The one with the small counterweight that compensates for the change in the crank flange from 2 pc to 1 pc.
post #37 https://www.thirdgen.org/forums/tran...ml#post6224367

Last edited by NoEmissions84TA; 05-26-2018 at 06:14 PM.
Old 05-27-2018, 09:23 AM
  #60  
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Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
Re: T-5 swap gone bad

Originally Posted by NoEmissions84TA
So to clarify, this is the flywheel heavyduty needs, correct? p/n 14088671 N
The one with the small counterweight that compensates for the change in the crank flange from 2 pc to 1 pc.
post #37 https://www.thirdgen.org/forums/tran...ml#post6224367
yes, heavyduty need 14088671
Old 06-29-2018, 08:43 PM
  #61  
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Car: 1991 Camaro RS
Engine: stock 305
Transmission: T-5
Axle/Gears: 4th gen with 342's
Re: T-5 swap gone bad

****UPDATE**** so the vibration problem has been solved.... It was a simple fix. The one piece RMS 5.0 takes a NEUTRAL balanced flywheel... Dont care if the flex plate has the butterfly weight on it... Finally had the chance to swap out the standard balanced for the neutral balanced and reused all the hardware and NO balance... Im thinking the information on this subject should be updated so others dont run into this issue. Thanks to everyone that offered advice on the subject it was much appreciated.
Old 06-29-2018, 10:25 PM
  #62  
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Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: T-5 swap gone bad

Glad you solved it.
Do a burnout to celebrate.
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