lift and tire size help!!! - 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 > lift and tire size help!!!

JK specific skid plates from Clayton Off Road Mfg.RCV Heavy Duty Axle Shafts Now Shipping at Baseline4x4.comStainless Steel Door Hinge Pins

Reply
Unread 05-05-2011, 09:44 AM   #1
OleBlueCJ7
Registered User
1979 CJ7 
 
Join Date: May 2011
Location: new smyrna beach, fl
Posts: 9
lift and tire size help!!!

I want to put 35's on my 1979 cj7. I have a 2" body lift with 32's on it right now. Will I be able to fit the 35's with a 2.5 suspension lift or do I have to get a 4" lift. I was trying to go as small a possible to fit the 35's in hopes of still fitting in my garage. I got a awesome deal on new maxxis 35's so I'm stuck with them. The wheels I'll be using will have a 3-5/8" back space. Thanks for any input.

OleBlueCJ7 is offline   Reply With Quote
Unread 05-05-2011, 11:21 AM   #2
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
Welcome to the forums. You should finish filling out your profile. On the lift, assuming you have a TH400 transmission, you would also have a quadra-trac. I have a 79 cj7 TH400/quadra-trac with a 3" spring lift, and no body lift. I'm running 33's.
With a 4"lift there will be drive shaft angle problems. You would most likley need to use a CV/double cardan driveshaft. The 35's would fit, but, they would still contact the body off road.

Bill
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote
Unread 05-05-2011, 11:28 AM   #3
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
Quote:
Originally Posted by lucdog
Welcome to the forums. You should finish filling out your profile. On the lift, assuming you have a TH400 transmission, you would also have a quadra-trac. I have a 79 cj7 TH400/quadra-trac with a 3" spring lift, and no body lift. I'm running 33's.
With a 4"lift there will be drive shaft angle problems. You would most likley need to use a CV/double cardan driveshaft. The 35's would fit, but, they would still contact the body off road.

Bill
This is my 83, with 2.5" spring and 1" body lift. There are 35" tires on it in the picture. The tires don't rub the body while on the road, they can not be used off road.
It just fits under my 7' garage door
Bill
forumrunner_20110505_122333.jpg  
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote
Unread 05-05-2011, 11:30 AM   #4
MightyLampshade
Senior Member
 
MightyLampshade's Avatar
1979 CJ7 
 
Join Date: Apr 2010
Location: Cleveland OH
Posts: 739
Filling out the profile would help us but assuming things are stock we're looking at a TH400 into a Quadratrac TC which means you're running stock Dana 30/AMC 20 axles with a 3.54 gear ratio. I don't know what you do with your Jeep but 35s on a stock AMC 20 is asking for trouble and with that gear ratio you will notice it being more sluggish than when you had your 32s. The 304 is a strong enough motor for the 35s but you will still likely notice the difference and you probably won't care for it.

Realistically if you plan to keep your 2" body lift you could probably cram 35s underneath by adding a 2.5" suspension lift but as lucdog mentioned once you get above ~3" you have driveline angle issues come into play. You'd need a drop pitman arm and likely have to come up with some new/customized driveshafts.

I would ask why you want to go to 35s in the first place. I understand you got a good deal on them but that is a substaintial jump in tire size and it will require more modifications than just cramming a bigger lift under your Jeep.
__________________
Quote:
Originally Posted by Keith
Let's make fun of him for being assaulted by chicken so he can claim emotional distress.
1979 Golden Eagle Rebuild
MightyLampshade is offline   Reply With Quote
Unread 05-05-2011, 11:31 AM   #5
79jeepincj7
Registered User
1979 CJ7 
 
Join Date: Jul 2010
Location: Burlington, Vermont
Posts: 935
I'm running 4" superlift springs, 1.5-2" body and 1 1/8 drop shackles and I clear 36x14.50's just fine with a normal driveshaft. I had to have it lengthened and droped the transfer an inch.. Other then that no issues. Goes down the highway at 75 no problem..



__________________
Wheel - Wreck - Wrench - Repeat!

The VIN says its a 79 CJ
79jeepincj7 is offline   Reply With Quote
Unread 05-05-2011, 11:46 AM   #6
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
79 Jeep, the OP most likley has a TH400 and a quadra-trac. You are using a T-18/Dana 300, big difference. The driveshafts in these are shorter than the one in my 5
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote
Unread 05-05-2011, 12:01 PM   #7
79jeepincj7
Registered User
1979 CJ7 
 
Join Date: Jul 2010
Location: Burlington, Vermont
Posts: 935
truth.. I did overlook that. so you may need a double cardan in the rear.. in that case find a junk xj and take the front shaft to a driveshaft shop and they can make you a new rear if there is an issue. also pull the yoke from the transfer.. it will slide onto the dana 300 splines. Not 100% positive if they are the same splines on the quadratrac transfer or not
__________________
Wheel - Wreck - Wrench - Repeat!

The VIN says its a 79 CJ
79jeepincj7 is offline   Reply With Quote
Unread 05-05-2011, 01:55 PM   #8
lucdog
Web Wheeler
 
lucdog's Avatar
1980 CJ5 
 
Join Date: Jul 2006
Location: , Il.
Posts: 7,761
Lampshade is correct on the gear ratio. 4.10's would be the minimum for 35's.

The q-trac is a 10 spline.
Bill
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is offline   Reply With Quote
Unread 05-05-2011, 07:05 PM   #9
gojeepin
Registered User
1983 CJ7 
 
Join Date: Feb 2006
Location: Riverview, Florida
Posts: 3,439
The lift you're talking about may be enough to give you the vertical clearance in the rear but you'll need to cut the rear of the tub to get enough horizontal clearance to let the tire tuck up in the wheel well.
__________________
Vibration? Bump steer? Wandering? Read: Steering, suspension, and driveline basics. An article on how it works and where to look for problems.

83 CJ7, 4.1L 6cyl (4.0L bored .030" over), 35" tires, T-5 transmission, Dana 300 TC, Trussed AMC 20.
gojeepin is offline   Reply With Quote
Unread 05-05-2011, 07:14 PM   #10
my_304_cj7
Registered User
1976 CJ7 
 
Join Date: Dec 2010
Location: Troy, Mi
Posts: 796
I can't fit in my garage with 33's if I have my top up. Gotta put the top down to get in there. I like the look of 35's and 4in lift but I didn't go that route for the exact reasons mentioned. You can't just throw on the lift and tires and go. There are more mods and more money that go into it. I am regretting buying 33's, they look stuffed with the 2.5" lift.
__________________
'76 CJ7 Quadra-Trac 304 2.5" superlift 1" body lift 33" DuraTrac's
my_304_cj7 is offline   Reply With Quote
Unread 05-12-2011, 12:12 PM   #11
OleBlueCJ7
Registered User
1979 CJ7 
 
Join Date: May 2011
Location: new smyrna beach, fl
Posts: 9
Thanks everyone for the info. It was a big help. I believe eveything is stock on the jeep. I don't believe it has 3.54 gears though. Its about 2500 rpm at 55 mph. Seems awful high for that ratio. I think i'll take everyones advice and either put a 2.5" suspension with 33's or i'll just keep it the way it is for now. I don't do any off roading so I think I should be able to get away with the small lift. Does anyone know a place to pick up some mickey thompson classic II cheap? thank again
OleBlueCJ7 is offline   Reply With Quote
Unread 05-12-2011, 12:18 PM   #12
79jeepincj7
Registered User
1979 CJ7 
 
Join Date: Jul 2010
Location: Burlington, Vermont
Posts: 935
I get most of my stuff through www.summitracing.com they have free shipping so thats always nice for engine parts and wheels etc.
__________________
Wheel - Wreck - Wrench - Repeat!

The VIN says its a 79 CJ
79jeepincj7 is offline   Reply With Quote
Unread 05-12-2011, 01:18 PM   #13
benullman
Registered User
1981 CJ7 
 
Join Date: May 2010
Location: mechanicsville, VA
Posts: 2,137
Quote:
Originally Posted by OleBlueCJ7 View Post
Thanks everyone for the info. It was a big help. I believe eveything is stock on the jeep. I don't believe it has 3.54 gears though. Its about 2500 rpm at 55 mph. Seems awful high for that ratio. I think i'll take everyones advice and either put a 2.5" suspension with 33's or i'll just keep it the way it is for now. I don't do any off roading so I think I should be able to get away with the small lift. Does anyone know a place to pick up some mickey thompson classic II cheap? thank again
you have 32s correct?

Is your speedo correct Do you have a tach? If might be 2-3MPH off since stock tires are like 29". If so you probably have 4.10. with 4.10 and 32s with a 1:1 tranny you are runnning 2400rpm at 55mph

Ben
__________________
[QUOTE=Gregg79CJ7304;11634021]Great minds think alike, but so do serial killers......Thanks.[/QUOTE]
benullman is offline   Reply With Quote
Unread 05-13-2011, 09:32 AM   #14
OleBlueCJ7
Registered User
1979 CJ7 
 
Join Date: May 2011
Location: new smyrna beach, fl
Posts: 9
Yeah i have a tach. The tires are not caliberated. Its about 3-4 mph at 55. But ill get a exact rpm today and see what I got
OleBlueCJ7 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





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.