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Unread 03-07-2013, 09:26 PM   #1
kchadtho
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1983 CJ7 
 
Join Date: Sep 2012
Location: Longview, TX
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Why the spacers to lift my T-5?

I haven't had my CJ7 long before a clutch problem. When pulling the transmission, I found 1" tall spacers (hard plastic structured cylinders... not rubber) located between the stock transmission mount and the transmission itself. The skid plate is factory and is not dropped. The Jeep has a 4" leaf suspension lift and no body lift. While I certainly might not understand driveline geometry, common sense seems to say that lifting the tranny makes my drive shaft angle worse (and I already have some vibration). Then I thought that maybe the motor mounts are lifting the motor some?? I've never heard of that, but I did measure the rubber part of the motor mount... just a bit over 1-3/4" thick. Anyway, searches in this forum regarding spacers to lift a transmission didn't pan out. Any ideas? Thanks in advance for sharing your experience.

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Unread 03-07-2013, 10:43 PM   #2
jeepwhore
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If you are thinking the transmission should be bolted directly to the skid plate, you're mistaken. Sounds like someone replaced the stock rubber transmission mount with a poly one. Got a picture of it? That will clear things up.
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Unread 03-07-2013, 10:51 PM   #3
jeepwhore
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Just re-read your post. So the stock rubber mount and torque arm is still there and the spacers are between that and the tranny? Definitely wierd. Could be someone raised the tranny to give more clearance between the back of the valve cover and the firewall. But thats certainly an odd way to do it.
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'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.

The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her.
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Unread 03-08-2013, 08:40 AM   #4
kchadtho
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Your second read is correct... stock transmission mount and torque arm, but between that and the tranny are the 1" spacers. Other than possibly closing the gap between the valve cover and the firewall, wouldn't removing the spacers actually improve my drive shaft angle? My purpose for asking is mainly vibration related. Although the vibration isn't all that bad, if the spacers aren't helping me any, I'd just as soon toss them. I just don't have the confidence to do so without asking some more experienced guys.
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Unread 03-08-2013, 09:39 AM   #5
travisrda
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never heard of having spacers there, usually if you add a lift then you need to drop the transmission to improve the driveline angle. What are the spacers shaped like? How many are there? if they are round maybe you could re-use them to put between your cross-member and the frame to drop the tranny more, that is if you are still having driveline vibration issues.
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Unread 03-08-2013, 10:53 AM   #6
scrapman
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The only reason I could think of to do that would be if the valve cover was hitting the fire wall causing problems. I have seen this happen when people drop their skid plate to help driveline vibrations, but never heard of anyone lifting the transmission.

Just a shot in the dark.
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Unread 03-08-2013, 11:12 AM   #7
only in a jeep cj
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Check to see if there is a one inch body lift. The po might have raised it the keep the shifter/ tub/ boot relationship like stock
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Unread 03-08-2013, 11:52 AM   #8
shadoow
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Is it possible the support plate is not in the correct position? Are the spacers located in a 'valley' area of the support plate - ie if the torque arm was over a high area of the support plate instead of a valley the spacers wouldn't be needed??
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Unread 03-08-2013, 05:49 PM   #9
kchadtho
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thanks everyone for weighing in...

On the question regarding a body lift, the bushings on top of the frame mounting pads are only about 3/4" tall. Just looking at pictures of body lift kits, I'd say my Jeep doesn't have a body lift.

Shadoow, you are probably onto something. I don't guess I know what the correct skid plate location is. But, definitely, of the three "steps" in the plate, it was mounted on the lowest (to the ground) step. Of the three bolt hole locations on each side of the skid plate, there were only two bolts installed on either side... and the third hole didn't really line up. So, does anyone know which "step" the transmission should be mounted on?
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driveline , lift , transmission mount

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