Drive line issues:

Greg Reimer 7376 · 05-11-2013, 10:40 PM

Gotta question. My 68 Chevelle wagon, 5.57 gears,350 trans, 327/245 horse,went with me to Irwindale for Summit last weekend. Third pass, the rear end failed. I got the car off the track OK, but about six teeth in a row failed on the ring gear. I put a spare set of 5.38's in it, car's together again, but Tony Janes wants me to pull the 350 out and check it for a bad sprag. Which sprag would have failed? The car seems to move in gear fine, I'm not sure if ring gear failure two feet off the line really would hurt it, but the trans comes out next weekend for a look(it leaks anyway, so we were going to reseal it),have any of you ever damaged a trans doing that? When I blew an engine at the end of first gear about two years ago, it rolled the sprag in the converter,which we had fixed, but that was a Powerglide. This three speed is kind of a different animal.Talking about animal, you should see this car leave!

Dickens · 05-11-2013, 10:48 PM

Hi Greg
I would recommend a call to Leo G. on the tranny stuff.
How did the 5.38 compare to the 5.57? Just curious.
Thx
DD

ss3011 · 05-12-2013, 10:15 AM

You would want to check the Lo Roller clutch, that is part of a support that is splined into the case close to the gearsets. A nice upgrade is to replace the support and roller clutch with one from a late model 4L65-e .

Greg Reimer 7376 · 05-12-2013, 04:02 PM

Quote:

Originally Posted by Dickens

Hi Greg
I would recommend a call to Leo G. on the tranny stuff.
How did the 5.38 compare to the 5.57? Just curious.
Thx
DD

I haven't run the car with 5.38's yet. 5.57's are only 3-4 % lower, so I imagine putting radial tires on the car would compensate for 5.57-bias ply tires . I did run the car in the 1/8th with bias ply-5.57's and then put the radials on and picked up .05. Tony Janes owns the trans so it probably will go to someone like Leo.Meanwhile the Powerglide and converter go back in.

05-11-2013, 10:40 PM	#1
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,135 Likes: 172 Liked 704 Times in 218 Posts	Drive line issues: Gotta question. My 68 Chevelle wagon, 5.57 gears,350 trans, 327/245 horse,went with me to Irwindale for Summit last weekend. Third pass, the rear end failed. I got the car off the track OK, but about six teeth in a row failed on the ring gear. I put a spare set of 5.38's in it, car's together again, but Tony Janes wants me to pull the 350 out and check it for a bad sprag. Which sprag would have failed? The car seems to move in gear fine, I'm not sure if ring gear failure two feet off the line really would hurt it, but the trans comes out next weekend for a look(it leaks anyway, so we were going to reseal it),have any of you ever damaged a trans doing that? When I blew an engine at the end of first gear about two years ago, it rolled the sprag in the converter,which we had fixed, but that was a Powerglide. This three speed is kind of a different animal.Talking about animal, you should see this car leave!

05-11-2013, 10:48 PM	#2
Dickens Member Join Date: Jun 2011 Location: CA/Iowa Posts: 107 Likes: 71 Liked 12 Times in 8 Posts	Re: Drive line issues: Hi Greg I would recommend a call to Leo G. on the tranny stuff. How did the 5.38 compare to the 5.57? Just curious. Thx DD

05-12-2013, 10:15 AM	#3
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Drive line issues: You would want to check the Lo Roller clutch, that is part of a support that is splined into the case close to the gearsets. A nice upgrade is to replace the support and roller clutch with one from a late model 4L65-e .