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  #1  
Old 04-03-2009, 03:37 PM
KMag KMag is offline
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Join Date: Jun 25, 2008
Location: Louisville. Ky
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Help needed with a 78 J20 clutch and bearing retainer

I have a problem that I have been working on for some time now, and I have come to the conclusion that I need to ask for advice.

My 360 V8, J20 had a problem where the Transmission input shaft bearing retainer needed to be replaced.

I bought a replacement bearing retainer from Bluimthals a while back. To make a long story short, the shaft on the bearing retainer where the TO bearing slides was worn out, and it broke off. I could not find a replacement one anywhere. Bluimthals had a similar one that was 10" long (the same length and same ID), but the OD was was larger.

After a lot checking around, I was able to find a larger TO bearing that was similar to original bearing and would fit over the new, larger dia. shaft on the new retainer. I got it all put back together and now the problem. It will not release the pressure plate.

I adjusted the clutch all the way up, but no matter what I did, depressing the clutch peddle would not disengage the clutch. I took it back apart trying to figure out why. I could not see where the problem was. I thought the clutch disc was in backwards, but it was not. After I got it put back together today, I was hoping the best, but there was no change.

I am going to take it back apart next week and do some more thinking. It crossed my mine that maybe the problem is the TO Bearing. It is larger in diameter than the OEM one by about 3/8 to 1/2". I didn't measure it, but I will when I tear it back down. I was thinking that the larger diameter will not push the PP arms down correctly, and is binding. The PP and clutch disk are new. A long shot is that the PP is not the correct one, but I compared it old the old one and it looked very much the same.

Anyone have any thoughts on this? Any suggestions would be appreciated.

Thanks
Ken M
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  #2  
Old 04-03-2009, 06:07 PM
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Elliott Elliott is offline
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I could be mistaken but I think the '80+ T18 used a thicker retainer. Might get on RockAuto and see if they have two different part numbers for throwout bearings, before and after '80. Then, if so... is there two different part #s for the pressure plates also and maybe you can just swap in a later pressure plate and be good to go.

Anyone else have any ideas for him? I have both retainers to compare but I don't know that the early one is so thin just because it's worn out...
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  #3  
Old 04-03-2009, 09:07 PM
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Elliott Elliott is offline
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There's your problem: Different OD on the release bearing...






1979 JEEP J10 5.9L 360cid V8 2BBL (N) : Clutch : Clutch Release Bearing
Price
Core
Total


</SPAN>BCA/NATIONAL Part # R1605C {Ball Bearing Bore=1.3175" Outer Diameter=2.7344" Width=1.68"}
Bearing Assembly


Choose: [Regular Inventory -- Full Mfr. Warranty] ($39.79)[Wholesaler Closeout -- 30 Day Warranty] (Only 2 Remaining) ($23.79)







BCA/NATIONAL Part # 1505 {Ball Bearing Bore=1.4995" Outer Diameter=2.7344" Width=0.625"}
Bearing Only













1984 JEEP J20 5.9L 360cid V8 2BBL (N) : Clutch : Clutch Release Bearing
Price
Core
Total


</SPAN>BCA/NATIONAL Part # 1625 {Ball Bearing Bore=1.6255" Outer Diameter=3.0625" Width=0.687"}
Bearing Only





$21.79
$0.00
$21.79


BCA/NATIONAL Part # 614115 {Ball Bearing Bore=1.435" Outer Diameter=2.76" Width=1.18"}
Bearing Assembly



They use a differen't clutch assembly also:


1979 JEEP J20 5.9L 360cid V8 2BBL (N) : Clutch : Clutch Kit
Price
Core
Total

</SPAN>BRUTE POWER Part # 90408 {Cover Type: Lever; 10.95x10Tx1 1/8}
Lever; 10.95x10Tx1 1/8 (Only 1 Remaining)



$150.79
$0.00
$150.79
ACDELCO Part # 381155 {replaces 88989180 #19182410, 88989180}
PLATE KIT,CLU PRESS & DRVN (W/ CVR) [US vehicles]; LEVER 10.95X10TX1 1/8



$176.79
$0.00
$176.79



1984 JEEP J20 5.9L 360cid V8 2BBL (N) : Clutch : Clutch Kit
Price
Core
Total

</SPAN>BECK/ARNLEY Part # 0616160
Clutch Set, 280mm Diameter;11" Diameter;10 Splines;1 Per Car
280mm Diameter;1 Per Car [Wholesaler Closeout -- 30 Day Warranty] (Only 2 Remaining)



$91.79
$0.00
$91.79
BRUTE POWER Part # 90427 {Cover Type: Lever; 10.95x10Tx1 1/8; 11" Clutch}
Lever; 10.95x10Tx1 1/8 (Only 1 Remaining)



$161.79
$0.00
$161.79
ACDELCO Part # 381158 {replaces 88989184 #19182412, 88989184}
PLATE KIT,CLU PRESS & DRVN (W/ CVR) [US vehicles]; LEVER 10.95X10TX1 1/8

* Non-stock item--shipping delayed up to 5 business days







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Last edited by Elliott : 04-03-2009 at 09:13 PM.
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  #4  
Old 04-04-2009, 07:49 PM
KMag KMag is offline
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Elliott,

Thanks a bunch! I will check out this info and see if I can find the correct combination of PP and TOB.

Thanks again!

KMag
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  #5  
Old 04-04-2009, 08:09 PM
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Elliott Elliott is offline
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Location: Pilot Point, TX
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Please let me know if that makes the difference for you.
__________________
*** I am collecting pics and info on any factory Jeep Dually trucks from the J-Series at the new Jeep Dually Registry.
***I can set you up with hydroboost for your brakes: http://www.ifsja.org/forums/vb/showthread.php?t=106056
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