need transmission help
Thread Starter
Safety Car
Joined: Feb 2002
Posts: 4,286
Likes: 4
From: Guam
need transmission help
My two friends running Super Comp dragsters both have Transmission Specialties' powerglide transmissions. One of them has never run his car down the dragstrip. He was moving his car around when the trans broke. Upon disassembly, we found out that the pump broke. So we replaced it and low and behold, a couple of minutes later it happened again. So we diassembled it again. We then found out that the tangs on the pump gear that atttaches to the torque converter completely broke off. So a third pump was installed. This time the same thing happened but at idle before the trans could be shifted in to gear. Upon careful comparison between the transmissions of the two dragsters, we noticed a difference in how the trans coolers had their lines routed. The older dragster had the lines attached to "in" and "out" ports near the bell housing. The newer one that kept breaking the pump utilized the "out" port on the bellhousing area and a fitting that was fitted to the trans oil pan. Could this rounting of fluid cause the problem with the pump. Or could we have a more serious problem internally? Anybody know what we should do?
Team Owner
Joined: Nov 1999
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
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Re: need transmission help (Sharky Guam)
I'd start at the begining. Where had that car and trans been and was there any problems with it before he got it. and then I'd take to someone that can slove the problem.
[Modified by mackeyred96, 9:14 AM 5/30/2004]
[Modified by mackeyred96, 9:14 AM 5/30/2004]
Thread Starter
Safety Car
Joined: Feb 2002
Posts: 4,286
Likes: 4
From: Guam
Re: need transmission help (mackeyred96)
The trans had no time on it. It was brand new. We suspect that we should have hooked the cooling lines up at the two conventional ports. Plugging the "in" line may have been a mistake. TS told us how to hook it up.So we did what they said and broke the pumps. Does anyone know if hooking up differently like we did can damage the pumps like we did? Did plugging the "in" line cause a vacuum to lock up the pump and cause the damage? Or was there over pressure somewhere. TS does not open until Tuesday and we were wondering if any one here had a similar experience.
Thread Starter
Safety Car
Joined: Feb 2002
Posts: 4,286
Likes: 4
From: Guam
Re: need transmission help (Sharky Guam)
I guess no one here is familiar with what it takes to break a pump continuously like we have been doing. I suspect that the lines to the cooler are not hooked up properly causing either an overpressure or a suction restriction that would cause the pump to lock up and break the tangs on the gear.
I will just have to wait and call Transmission Specialites early tuesday morning.
I will just have to wait and call Transmission Specialites early tuesday morning.
