GM246 Transfer case upgraydd
Thread Starter
TECH Fanatic
Joined: Jul 2022
Posts: 1,046
Likes: 396
From: Alaska
GM246 Transfer case upgraydd In process of installing a 4L80 in half ton suburban, so I have to change the INPUT spline shaft on 246 T-Case.
Disassembling the case, the rear magnesium case half is PRISTINE, beautiful. Zero debris on pump pickup filter. Magnet is clean.
Rear case pump locating spring clip is intact, shows NO wear and ZERO contact wear from pump thrust face.
the question is :
SHOULD I rip out the fragile spring clip, and install steel "case saver" in an other wise perfect case half... or just replace the input spline shaft, new seals, orings and glue it back together as is ?.
.
simply restated: Should I install Case-Saver or NOT ?
.
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. Second question, on the subject : Is there much difference between the BLUE Auto-Trak fluid and DexronVI ?
Definitely drained OUT clean Red ATF from this case.
Disassembling the case, the rear magnesium case half is PRISTINE, beautiful. Zero debris on pump pickup filter. Magnet is clean.
Rear case pump locating spring clip is intact, shows NO wear and ZERO contact wear from pump thrust face.
the question is :
SHOULD I rip out the fragile spring clip, and install steel "case saver" in an other wise perfect case half... or just replace the input spline shaft, new seals, orings and glue it back together as is ?.
.
simply restated: Should I install Case-Saver or NOT ?
.
.
. Second question, on the subject : Is there much difference between the BLUE Auto-Trak fluid and DexronVI ?
Definitely drained OUT clean Red ATF from this case.
ABSOFREAKINGLUTELY put the case saver in. You can use regular Dexron (like what you use in a 4l60) transmission fluid, but I take it a step further an use Honda ATF dw1 in my son's or any transfer case I build. Bout the only other upgrade i know of is a 6 pinion planetary. My son busted his 4 and I put a 6 in it. I also add a half quart of Lucas oil stabilizer to it. Thats just my preference. Does it help? Meh, I dunno. It seems to make it more quiet and less chunky.
I'd change the shift fork pads too.
I'd change the shift fork pads too.
TECH Junkie
Joined: Dec 2012
Posts: 3,622
Likes: 1,337
From: Iowa
Agree
YES to the case saver
I've always had good luck with Dex VI
I'd add a new magnet to your list as well as replace both the drain and fill plugs with magnetic versions.
And use the RTV sparingly...it doesn't take much. Any excess usually just ends up in the darn pickup screen and then slows oil flow
YES to the case saver
I've always had good luck with Dex VI
I'd add a new magnet to your list as well as replace both the drain and fill plugs with magnetic versions.
And use the RTV sparingly...it doesn't take much. Any excess usually just ends up in the darn pickup screen and then slows oil flow
Agree
YES to the case saver
I've always had good luck with Dex VI
I'd add a new magnet to your list as well as replace both the drain and fill plugs with magnetic versions.
And use the RTV sparingly...it doesn't take much. Any excess usually just ends up in the darn pickup screen and then slows oil flow
YES to the case saver
I've always had good luck with Dex VI
I'd add a new magnet to your list as well as replace both the drain and fill plugs with magnetic versions.
And use the RTV sparingly...it doesn't take much. Any excess usually just ends up in the darn pickup screen and then slows oil flow
I put brass plugs in because the aluminum ones suck (had to fight one out night before last!) but magnetic ones sound like a good idea.
TECH Junkie
Joined: Jun 2008
Posts: 3,207
Likes: 1,395
From: Nitro Alley
Hondabond is most likely the absolute best RTV for one thing...
Problematic Joints that will not seal well (especially between different Metals or poorly machined Parts).
It Seals up Leaks amazingly!
It's pretty bad at removal/ clean-up on rebuilding.
Problematic Joints that will not seal well (especially between different Metals or poorly machined Parts).
It Seals up Leaks amazingly!
It's pretty bad at removal/ clean-up on rebuilding.
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I agree. It’s hard to get it off! But I get loads of it for free. The techs give me all I ask for. So I use it ALOT.
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