DragStuff

How many of you run a tranny gauge and if so, what temp do you look for?

I was told somewhere between 180-200, is that correct?

Where is the best place to mount the probe, in the pan or somewhere in the tanny cooler lines.

Thanks

Bruce

My trans guy had me put mine in the pan. 180/200 is fine, but the cooler the better.

I put mine in the inlet side of my big trans cooler. My thought was I need to know the hottest point in the system. And like John said, the cooler the better.

Mine is right before my trans cooler as well. I usually have it around 160 when I leave the line.

If I remember right I made 5 or 6 back to back passes at a test aand tune last spring and that pushed it up to 280. But those were eigth mile passes.

Thanks

I'm thinking about putting it in the pan. I'm going to get a cast pan and I'll drill things out before I put it all back together.

Bruce

Kinda off subject but in a drag only car anybody NOT run any type of trans cooler? I was thinking off just making a "loop" and not using any cooler. Im not going to bracket race so Im not worried about going rounds but if the cooler is the way to go Ill just put it back in.

sc racing wrote:Kinda off subject but in a drag only car anybody NOT run any type of trans cooler? I was thinking off just making a "loop" and not using any cooler. Im not going to bracket race so Im not worried about going rounds but if the cooler is the way to go Ill just put it back in.

Actually quite a few run without one and just loop the lines. When I talked to Sid Neal about that he said sure you can do that. However, you'll probably have to send it in to have it serviced more often than if you ran a cooler, but it's your choice. So I left it in...

This may sound stupid but with you being out in AZ aren't you afraid that the air temperature will add extra heat to your tranny and cause some issues without running a cooler?

Bruce

Bruce69Camaro wrote:This may sound stupid but with you being out in AZ aren't you afraid that the air temperature will add extra heat to your tranny and cause some issues without running a cooler?

Bruce

I was thinking the hot air would make it hotter But seriously in the summer the track is open at night and its about 15-20* cooler than in the daytime so the ambient temps wouldnt be that bad. I will probably put the cooler back in I was just being lazy about making new lines and finding a place to mount it.

I hear you....

Best thing I did was get braided steel lines and AN fittings and made things so much easier.

Mounted my B&M cooler in front of my radiator. I just hope it doesn't affect the engine temp. But
I do have a 12" electric fan.

But you gotta admit, working with tranny fluid is not one of my favorite things....

Bruce

Im not a fan of braided lines although they are much easier. Im going to use steel lines with AN fittings but I dont know where Im going to put the cooler yet. I got a nice dual pass Fluidyne radiator and dual 11" Spal fans but I dont want to mount it there.

I've considered putting a guage on my transmission, too. But a pressure guage, not tempertature.
It would be nice to go enough rounds for heat to be an issue. To go those rounds you've got to have
sufficient (and consistant) pump pressure.
But then, again, not so much pressure as to thrust the convertor into the crank and wipe out the thrust bearing.
At least there's an easy fix now for that one.

HPDRIFTER wrote:I've considered putting a guage on my transmission, too. But a pressure guage, not tempertature.
It would be nice to go enough rounds for heat to be an issue. To go those rounds you've got to have
sufficient (and consistant) pump pressure.
But then, again, not so much pressure as to thrust the convertor into the crank and wipe out the thrust bearing.
At least there's an easy fix now for that one.

Whats the easy fix for that ? I have a VM300 solid input shaft on my TH400 and I came up with a solution to help with pressure buildup and resulting pressure on the back of the crank, but I'd be interested in what you did.

I ended up dropping my trans pressure down to around 200 psi and machined some splines on the input shaft. I learned afterwards this is a well known trick to relieve the return pressure and ease the crank thrust issue.

Here's a shot of the input shaft, note the relieved splines.




And now we return you to your normal programming, already in progress - Trans Gauge discussion