Another broken transfer case

[20psimitsu]

We ran the car at IFO in Houston and snaped the shaft in the transfer case. Put another one in the car a finished the race. Next, we ran the car at Midnight Madness and on the third pass we broke another one. Wondering if any big dawgs on here would have any ideas why two transfer cases would go so quickly. This is happening on the shop drag car, which is a 90 GSX auto. Any wise input would help, thanks.

 

[HighPSI TSi Guy]

too much stress on the shaft. Eliminate the squat and get an aluminum driveshaft to help take the load off the Xfer shaft. Or run an open center diff.

 

[erecker]

I agree with TSi Guy. An aluminum shaft has more rotational "play" and will better absorb a hard launch.

Also check all your xfer case > tranny and tranny > engine bolts. If they are not tight, the parts could be moving under load, which is sure to break something.

Also check the output shaft from the tranny, make sure it doesn't wiggle side/side, up/down or in/out. Same for driveshaft once it's hooked up to the xfer case.

 

[90laserRSfwd]

Are you using the stock transfer case or the upgraded on with the 3 1/2" outlet? (DSS / Shep upgrade)

 

[20psimitsu]

Stock

 

[chrish1440]

Are you using the stock transfer case or the upgraded on with the 3 1/2" outlet? (DSS / Shep upgrade)

They make those for autos?