Torque converter drain

[SFC Cobb]

Is there a torque converter drain plug on the allison? Where is it located?

 

[psyco66]

No there is not a drain.

 

[SFC Cobb]

Thanks. The older GM trans had a drain which was nice so you could get all the old fluid out. Oh well.

 

[saratoga]

Pulling the "to cooler" line and flushing as hoot describes in the thread below flushes the converter since the fluid in the line to the cooler directly from the converter.

http://www.dieseltowingresource.com/showthread.php?t=815

 

[whitetrash21]

what he said ^^^^ ... you'd be surprised at how much crappy fluid it will remove doing it that way...

 

[SFC Cobb]

I have already drained the trans and changed the filters. I have had the trans flushed several times in 265K miles and the last time was at 247K so the fluid was really not discolored much at all. Next go round I will try the flush like you all are talking about.

 

[Mike L.]

Thanks. The older GM trans had a drain which was nice so you could get all the old fluid out. Oh well.

I haven't seen a factory converter drain plug on a GM since 1964. You must be old.

 

[dentpusha]

I haven't seen a factory converter drain plug on a GM since 1964. You must be old.

HOLY SHEEP i havent seen you post here mike,glad to kno your skills are around here.

 

[WilliamBos]

I haven't seen a factory converter drain plug on a GM since 1964. You must be old.

Yeah, glad to see you here Mike. And also nice to know Hoot is around too. So is Eric Merchant here yet?? And what about Nick - DuramaxDiesel??

 

[SFC Cobb]

I had an 86 suburban that had one and my 94 Chev p/u as well. I didn't put them in so they had to be factory.

I am likely older that you.:conehead:eace:

 

[Mike L.]

I had an 86 suburban that had one and my 94 Chev p/u as well. I didn't put them in so they had to be factory.

I am likely older that you.:conehead:eace:

Someone else put them there as GM did not. My shop was a GM warranty station for 15 years and I had intimate conversations with GM engineers about this very thing. When GM went to the solid converter instead of the split converter they also went to full mainline pressure in the converter, ( other manuf. dont ) they felt a plug could become a hazard.

 

[ChampionTransmission]

Like Mike said, those drain plugs were not factory.
I have yet to seen an aftermarket converter rebuilder install a drain plug either.
I'm not that old though.

 

[stacks04]

my s/c has an allen head set type screw in it. is this a drain plug????

 

[Philbilly2]

my s/c has an allen head set type screw in it. is this a drain plug????

Yep, if it is an allen that you can access through the access hole in the bottom of the trans, then yes, that is the drain plug.

At least that is what my 5-Star has.