Coan XLT Turbo 350 Issues

Charlene Gullett · 08-11-2014, 12:22 AM

After the first time this trans smoked the clutches-1 pass down the track (Coan had just freshened this trans) , Coan has since updated the valve body, supplied a new pump and an oil pan with baffles in it for a super stock application( it was not free) . According to them, this is everything I needed. they also supplied every spec on clearances etc. What happened?? We hooked up a pressure gauge and are at a constant 200 psi at all forward gears, reverse, and with the transbrake engaged at 2000 + rpm.

I am having trouble finding that this could happen twice in 2 freshens after one hit on the track (one freshen by Coan and one by a rep trans builder) .

Coan's site talks about wheel standing cars and fluid cavitation. I eliminated this-tied down that front end. Minimal wheel stand action-same problem.

very frustrating!

08-11-2014, 12:22 AM	#7
Charlene Gullett Junior Member Join Date: Aug 2009 Location: Calgary Alberta Posts: 21 Likes: 1 Liked 7 Times in 2 Posts	Re: Coan XLT Turbo 350 Issues After the first time this trans smoked the clutches-1 pass down the track (Coan had just freshened this trans) , Coan has since updated the valve body, supplied a new pump and an oil pan with baffles in it for a super stock application( it was not free) . According to them, this is everything I needed. they also supplied every spec on clearances etc. What happened?? We hooked up a pressure gauge and are at a constant 200 psi at all forward gears, reverse, and with the transbrake engaged at 2000 + rpm. I am having trouble finding that this could happen twice in 2 freshens after one hit on the track (one freshen by Coan and one by a rep trans builder) . Coan's site talks about wheel standing cars and fluid cavitation. I eliminated this-tied down that front end. Minimal wheel stand action-same problem. very frustrating! __________________ 6521 GT/MA 85 Cutlass Last edited by Charlene Gullett; 08-11-2014 at 12:26 AM.