Couple questions? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Couple questions?

~Artec JK 1 TON SWAP~Advance Adapters SYE KitsTruc-Lite LED Headlights! OCONEE OFF-ROAD 706-534-9955

Reply
Unread 09-06-2013, 05:59 PM   #1
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Couple questions?

I have a T-18 mated to a SBC. I just started getting a shimmy that feels like it's in either the trans or the front diff. Curious as to see if anyone else has had this happen before. Also what fluid is recommended for the trans and the diffs? My other question has to do with the clutch...what clutch could I use to replace mine in case that's my issue? I don't know if there has to be a specific model or what. Thanks for any information.

__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-06-2013, 06:19 PM   #2
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,440
What speed?
What was the last thing you did to this Jeep?
Check to see if you broke the tranny mount or an engine mount.
Check to see if your tires need to be rebalanced.
See if you bent a wheel.
Ck all DS U-joints, and slip spline
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 09-06-2013, 06:47 PM   #3
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Quote:
Originally Posted by LumpyGrits
What speed?
What was the last thing you did to this Jeep?
Check to see if you broke the tranny mount or an engine mount.
Check to see if your tires need to be rebalanced.
See if you bent a wheel.
Ck all DS U-joints, and slip spline
LG
4 speed. Last thing I did was replaced the front driveshaft and it wasn't doing this. Tranny mount is good. Checked that. Will check the motor mounts.
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-07-2013, 08:17 PM   #4
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Any ideas?
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-07-2013, 08:27 PM   #5
jeepwhore
Hair puller xtraordinaire
 
jeepwhore's Avatar
1984 CJ7 
 
Join Date: Jun 2006
Location: Kamloops, BC
Posts: 2,991
Quote:
Originally Posted by sean112280

4 speed. Last thing I did was replaced the front driveshaft and it wasn't doing this. Tranny mount is good. Checked that. Will check the motor mounts.
LG means, at what speed does the shimmy occur? Does it happen in every gear regardless of how fast you are going?
__________________
'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.
:-D
jeepwhore is offline   Reply With Quote
Unread 09-08-2013, 11:55 AM   #6
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Quote:
Originally Posted by jeepwhore

LG means, at what speed does the shimmy occur? Does it happen in every gear regardless of how fast you are going?
I feel it most when it's in 3rd gear and when I downshift into second.
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-08-2013, 12:51 PM   #7
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,440
When was the last time you checked the U-joints for slop?
Get under the jeep and do so ASAP! Before you 'throw' the DS.
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 09-08-2013, 01:03 PM   #8
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Quote:
Originally Posted by LumpyGrits
When was the last time you checked the U-joints for slop?
Get under the jeep and do so ASAP! Before you 'throw' the DS.
LG
Just like a week or two ago when I replaced the driveshaft. I can grease them up again though
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-08-2013, 01:13 PM   #9
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,440
Get under that Jeep and see if you lost a snap-ring and check the DS U-joints for side to side play.
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 09-08-2013, 01:34 PM   #10
Spieg8
Registered User
1984 CJ8 
 
Join Date: Jun 2013
Location: Denver, CO
Posts: 1,028
I'm assuming you have a full time transfer case, and that's why the front drive shaft is engaged? Was the new drive shaft balanced (and is the balancing weight still attached?)?
Spieg8 is offline   Reply With Quote
Unread 09-08-2013, 01:41 PM   #11
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
It's a D20 and no it's not always engaged. The driveshaft came straight out of another CJ. Like I said this just started happening. The replacing of the DS was about 3 weeks ago. The shimmy didn't start until this past week
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-08-2013, 01:41 PM   #12
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Quote:
Originally Posted by LumpyGrits
Get under that Jeep and see if you lost a snap-ring and check the DS U-joints for side to side play.
LG
Will do
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-08-2013, 03:00 PM   #13
Spieg8
Registered User
1984 CJ8 
 
Join Date: Jun 2013
Location: Denver, CO
Posts: 1,028
Quote:
Originally Posted by sean112280 View Post
It's a D20 and no it's not always engaged. The driveshaft came straight out of another CJ. Like I said this just started happening. The replacing of the DS was about 3 weeks ago. The shimmy didn't start until this past week
Well there's some detail that was lacking (might list that TC on your profile). Anyhow, like LG stated, u-joints and tire balance would be the normal suspects for vibration. And to answer your earlier questions, 90wt gear oil is normal for a t-18, and the clutch shouldn't be different than normal for your SBC.
Spieg8 is offline   Reply With Quote
Unread 09-08-2013, 05:44 PM   #14
sean112280
Registered User
1997 XJ Cherokee 
 
Join Date: Nov 2010
Location: Joint Base Lewis-McChord, WA
Posts: 348
Thank you for the help. I will be digging into this further.
__________________
1974 CJ 5 SBC-SOLD
1997 XJ
XK/WK Owners Group #11
sean112280 is offline   Reply With Quote
Unread 09-08-2013, 10:11 PM   #15
BagusJeep
Web Wheeler
 
BagusJeep's Avatar
1981 CJ7 
 
Join Date: Jul 2009
Location: Bali, Indonesia
Posts: 4,259
Ave you taken the slip joint apart and put the shaft back together?

The joints need to work in opposite phases by 90 degrees to cancel out the change in angular velocity on each joint but there are two possible points and they are only balanced at the factory in one, at 90 degrees or 270 degrees. It can go back together in 20 odd different ways but only one is correct.

Look at your joints, are they 90 degrees out of phase? If so are you sure they are not 270 degrees out of phase as it will look identical?

This will cause vibration at speed and more keenly when the suspension is extended and those joints are working harder.
__________________
BagusJeep lives in Bali, the Land of Temples.
With a Jeep every prayer counts.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
BagusJeep is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.