Noise after 3 inch lift accelerating and decelerating
#1
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Model: Cherokee (XJ)
Noise after 3 inch lift accelerating and decelerating
Hello everyone, I just had a 3 inch RC lift with new springs on my 1999 Jeep Cherokee XJ Sport (4x2)....yeah i know....
The main problem is a grinding noise comming from underneath while driving over 30 mph. At constant speeds, everything is fine until I let off the accelerator, then i hear a grinding noise that will last for several seconds then stop. When I push on the accelerator i hear the grinding noise again but for a quick short time. I also noticed the slip yoke shaft that slides into the transmission tail housing is sticking out approximately 1.25 inches more than before and the seal it is now leaking. I found a very slight play in it side to side but it didnt seem to be alot at this point. The shop that put on the lift is saying they contacted RC and confirmed it was installed correctly but when I asked what the solution and cause of the noise, they were not completely sure, advising RC stated it might work itself out once the lift has been on for awhile. Thay advised the u joints looked good. At this point, I found a shop that primarily works on Jeeps and i will be taking it to them when I can. I was wondering:
1) What could be causing that grinding noise when pushing and letting off the accelerator.
2) What is the fix.
3) I it normal to have that much of the slip yoke shaft exposed after a lift.
Sorry that this post was so long and Id appreciate your feedback.
The main problem is a grinding noise comming from underneath while driving over 30 mph. At constant speeds, everything is fine until I let off the accelerator, then i hear a grinding noise that will last for several seconds then stop. When I push on the accelerator i hear the grinding noise again but for a quick short time. I also noticed the slip yoke shaft that slides into the transmission tail housing is sticking out approximately 1.25 inches more than before and the seal it is now leaking. I found a very slight play in it side to side but it didnt seem to be alot at this point. The shop that put on the lift is saying they contacted RC and confirmed it was installed correctly but when I asked what the solution and cause of the noise, they were not completely sure, advising RC stated it might work itself out once the lift has been on for awhile. Thay advised the u joints looked good. At this point, I found a shop that primarily works on Jeeps and i will be taking it to them when I can. I was wondering:
1) What could be causing that grinding noise when pushing and letting off the accelerator.
2) What is the fix.
3) I it normal to have that much of the slip yoke shaft exposed after a lift.
Sorry that this post was so long and Id appreciate your feedback.
#2
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Year: 96 & 88 4 dr Cherokees
Search....there are plenty of posts about this and similar problems that may help you.....knowing the model year/trans/t-case is a good thing too
here's one https://www.cherokeeforum.com/f67/xj...r-lift-247316/
.
here's one https://www.cherokeeforum.com/f67/xj...r-lift-247316/
.
Last edited by TRCM; 11-18-2018 at 08:43 AM.
#3
::CF Administrator::
One more reason avoid RC....since when has just leaving things alone ever worked out? That gets the Darwin advice award of the year. Terrible.
First thing I'd check is the u joints. You may need a SYE.
First thing I'd check is the u joints. You may need a SYE.
Last edited by Rogue4x4; 11-18-2018 at 10:09 AM.
#5
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Year: 1999
Model: Cherokee
Engine: Straight 6 4.0
I Had this problem too. The angles on your driveshaft are more than likely all wrong due to the lift. If you fix it they will go away. Cheapest advice transfer case drop brackets. Best advice a slip yolk eliminator. You can decide.
#6
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Sorry it took so long to reply and thank you for the replies....Im thinking the drivelines are not correct but not sure. The transmission looks vertical and the pinion is pointing slightly up. Just eyeballing, the driveshaft looks like around 15 degrees. I would like to put a sye on it but its a 4x2 and not possible. Didnt think that small of a lift would mess with anything major.....so im trying to see how to correct it. Any advise to correct on a 4x2? Thanks.
#7
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Year: 1999
Model: Cherokee
Engine: Straight 6 4.0
Use transfer case drop brackets. They will drop the transmission to get it closer to the correct degrees. It’s probably the best bet, I’m betting you aren’t going to take it off-road since it’s a 4x2 so they should work just fine. Many people will frown upon them but they have worked fine for me and I do some minor trails🤷🏼 They are just called transfer case drop brackets but they actually drop the transmission mounts and in a 4x4 drop the transfer case because it is connected to the transmission. Note: this will put more straight on your engine mounts.
Last edited by 99X-J; 11-23-2018 at 09:46 AM. Reason: Added important content
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#8
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Thank you for responding....you are correct. I wont be doing any major off roading. So if I drop the transmission down would it also shift the engine angle and mess with anything in the engine compartment for example ac lines and other. Just checking. And is that a safe common practice. Thank you again.
#9
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Year: 1997
Model: Cherokee
Engine: 4.0
Dropping the cross member will put stress on the motor mounts and cause potentially faster wear. I found using thick washers and new bolts worked well to adjust the drop just as much as it takes to get rid of driveline vibes. A single washer can make a difference in vibes. I am not saying one washer is all you will need just that adjustments are that small. Most produced tcase drop brackets are made of square stock and offer no way to adjust. You may need to shim the axle to get things dialed in. The only other real concern besides motor mounts IMO is to verify your mechanical fans clearance after the drop. Too much drop has the potential to put the fan very close to the radiator.
FWIW I ran a drop using washers for over 50k miles. I did replace original motor mounts during that time.
FWIW I ran a drop using washers for over 50k miles. I did replace original motor mounts during that time.
#13
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Model: Cherokee (KL)
Engine: 3.2 V6
Noise front and rear after MFC 3 inch lift with Dobinson springs, Fox shocks, RCV axl
Hello everyone, I just had a 3 inch RC lift with new springs on my 1999 Jeep Cherokee XJ Sport (4x2)....yeah i know....
The main problem is a grinding noise comming from underneath while driving over 30 mph. At constant speeds, everything is fine until I let off the accelerator, then i hear a grinding noise that will last for several seconds then stop. When I push on the accelerator i hear the grinding noise again but for a quick short time. I also noticed the slip yoke shaft that slides into the transmission tail housing is sticking out approximately 1.25 inches more than before and the seal it is now leaking. I found a very slight play in it side to side but it didnt seem to be alot at this point. The shop that put on the lift is saying they contacted RC and confirmed it was installed correctly but when I asked what the solution and cause of the noise, they were not completely sure, advising RC stated it might work itself out once the lift has been on for awhile. Thay advised the u joints looked good. At this point, I found a shop that primarily works on Jeeps and i will be taking it to them when I can. I was wondering:
1) What could be causing that grinding noise when pushing and letting off the accelerator.
2) What is the fix.
3) I it normal to have that much of the slip yoke shaft exposed after a lift.
Sorry that this post was so long and Id appreciate your feedback.
The main problem is a grinding noise comming from underneath while driving over 30 mph. At constant speeds, everything is fine until I let off the accelerator, then i hear a grinding noise that will last for several seconds then stop. When I push on the accelerator i hear the grinding noise again but for a quick short time. I also noticed the slip yoke shaft that slides into the transmission tail housing is sticking out approximately 1.25 inches more than before and the seal it is now leaking. I found a very slight play in it side to side but it didnt seem to be alot at this point. The shop that put on the lift is saying they contacted RC and confirmed it was installed correctly but when I asked what the solution and cause of the noise, they were not completely sure, advising RC stated it might work itself out once the lift has been on for awhile. Thay advised the u joints looked good. At this point, I found a shop that primarily works on Jeeps and i will be taking it to them when I can. I was wondering:
1) What could be causing that grinding noise when pushing and letting off the accelerator.
2) What is the fix.
3) I it normal to have that much of the slip yoke shaft exposed after a lift.
Sorry that this post was so long and Id appreciate your feedback.
#15
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Model: Cherokee (KL)
Engine: 3.2 V6
Still clicking noise when accelerating with MFC 2" lift
RCV that popped out May 9th while driving 30 mph on way to my work in the mine, road was smooth not rough at all
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