Trans Problems!

ZenzenRacing · 06-22-2020, 10:30 AM

Second time in 35 passes rolled the sprag for second gear on the T350 in the SS car! Ideas why?

Mike Taylor 3601 · 06-22-2020, 10:36 AM

I was told not make 1-2 shift in burnout, so I just started burnout in high, and if reverse pattern was told not shift from high back to neutral while moving....
both were hard on sprag..

ZenzenRacing · 06-22-2020, 10:41 AM

Yep, we do the 2nd to high burnout but on the other end we do go high to neutral.

57 Vette · 06-22-2020, 11:29 AM

Do Burn out in High Gear only. Make sure to use 36 Element Dog Bone Sprag with harded race.

bykr · 06-22-2020, 11:51 AM

I always thought that was funny, engine builders say don't leave it in gear at the end of a run and trans builders say don't shift to neutral

Lee Jordan (3223) A/S · 06-22-2020, 12:09 PM

From what I have been told if you shift to neutral after the run the trans wont oil good enough coasting so fast. I dont know for sure but understand that it is hard on the motor slowing down in gear too...

Jim Hanig · 06-22-2020, 01:51 PM

Quote:

Originally Posted by bykr

I always thought that was funny, engine builders say don't leave it in gear at the end of a run and trans builders say don't shift to neutral

It is not good to shift a 350 400 into netural at the line it over speeds the drum, sometime causing it to come apart.

ss3011 · 06-22-2020, 03:05 PM

Some of the aftermarket high gear drums have sprags that do not have end bearings . These are no good , the end bearings keep the inner and outer races concentric . Without the end bearings the sprag dog bones will not engage evenly and will roll over in short order .

Mike Pearson · 06-22-2020, 03:21 PM

one reason I stick with a powerglide. They are virtually indestructible. Not as fast as a good 3 speed. But very consistent and reliable. I know I could pick up a couple of tenths with a good 3 speed like a Coan XLT or a Pro trans.

Jim Kaekel · 06-22-2020, 07:53 PM

Another thing. Be sure the trans builder did not remove the accumulator spring. Some do. It will make the shift into second very harsh, which is hard on the intermediate sprag.

06-22-2020, 10:30 AM	#1
ZenzenRacing Member Join Date: Aug 2005 Posts: 263 Likes: 268 Liked 53 Times in 17 Posts	Trans Problems! Second time in 35 passes rolled the sprag for second gear on the T350 in the SS car! Ideas why?

06-22-2020, 10:36 AM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,367 Likes: 345 Liked 290 Times in 100 Posts	Re: Trans Problems! I was told not make 1-2 shift in burnout, so I just started burnout in high, and if reverse pattern was told not shift from high back to neutral while moving.... both were hard on sprag..

06-22-2020, 10:41 AM	#3
ZenzenRacing Member Join Date: Aug 2005 Posts: 263 Likes: 268 Liked 53 Times in 17 Posts	Re: Trans Problems! Yep, we do the 2nd to high burnout but on the other end we do go high to neutral.

06-22-2020, 11:29 AM	#4
57 Vette Junior Member Join Date: Jul 2018 Posts: 44 Likes: 386 Liked 38 Times in 14 Posts	Re: Trans Problems! Do Burn out in High Gear only. Make sure to use 36 Element Dog Bone Sprag with harded race.

06-22-2020, 11:51 AM	#5
bykr Member Join Date: Jan 2014 Location: SoCal Posts: 232 Likes: 274 Liked 167 Times in 81 Posts	Re: Trans Problems! I always thought that was funny, engine builders say don't leave it in gear at the end of a run and trans builders say don't shift to neutral __________________ Tim Schmackpfeffer 762 SS

06-22-2020, 12:09 PM	#6
Lee Jordan (3223) A/S Member Join Date: Jul 2011 Location: Kentucky Posts: 105 Likes: 191 Liked 55 Times in 17 Posts	Re: Trans Problems! From what I have been told if you shift to neutral after the run the trans wont oil good enough coasting so fast. I dont know for sure but understand that it is hard on the motor slowing down in gear too... __________________ 1967 Fairlane A/Stick - 1994 Mustang GT. 1989 Oldsmobile, R/SA - 2016 Z06 Weekend Street Car.

06-22-2020, 03:05 PM	#8
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Trans Problems! Some of the aftermarket high gear drums have sprags that do not have end bearings . These are no good , the end bearings keep the inner and outer races concentric . Without the end bearings the sprag dog bones will not engage evenly and will roll over in short order .

06-22-2020, 03:21 PM	#9
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,442 Likes: 613 Liked 1,915 Times in 574 Posts	Re: Trans Problems! one reason I stick with a powerglide. They are virtually indestructible. Not as fast as a good 3 speed. But very consistent and reliable. I know I could pick up a couple of tenths with a good 3 speed like a Coan XLT or a Pro trans. __________________ Mike Pearson 2485 SS

06-22-2020, 07:53 PM	#10
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,226 Likes: 133 Liked 529 Times in 107 Posts	Re: Trans Problems! Another thing. Be sure the trans builder did not remove the accumulator spring. Some do. It will make the shift into second very harsh, which is hard on the intermediate sprag. __________________ Jim Kaekel 3836 STK