1997 Wrangler Problem....
 

Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
installed on my 1997 Wrangler. Now, when I accelerate, I feel a
bumping noise underneath my feet. It only happens upon innitial
acceleration and is worse when on an incline. I took it to my local
repair shop and they are stumped. They checked the u joints and they
were fine. They removed each drive shaft and the mechanic said with
the rear shaft removed, that he didn't feel the bumping anymore. It
did this a little before the lift kit but now it's really bad. It
seems worse when I turn left upon acceleration. Any idea's? Thanks in
advance.

Brian Tanksley
Briantanksley@aol.com

Re: 1997 Wrangler Problem....
 

Control arms, track bars/brackets? Even if they look tight, they may be
loose and move only under load. Always go back to what you changed just
before the problem started.

Brian Tanksley wrote:

> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: 1997 Wrangler Problem....
 

Control arms, track bars/brackets? Even if they look tight, they may be
loose and move only under load. Always go back to what you changed just
before the problem started.

Brian Tanksley wrote:

> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: 1997 Wrangler Problem....
 

Control arms, track bars/brackets? Even if they look tight, they may be
loose and move only under load. Always go back to what you changed just
before the problem started.

Brian Tanksley wrote:

> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: 1997 Wrangler Problem....
 

Control arms, track bars/brackets? Even if they look tight, they may be
loose and move only under load. Always go back to what you changed just
before the problem started.

Brian Tanksley wrote:

> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________

Re: 1997 Wrangler Problem....
 

Did you convert to a constant velocity universal joints to
eliminate the severe oscillation that comes with anything over three
inch lift? http://www.pirate4x4.com/tech/billav...aft/index.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Tanksley wrote:
>
> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

Re: 1997 Wrangler Problem....
 

Did you convert to a constant velocity universal joints to
eliminate the severe oscillation that comes with anything over three
inch lift? http://www.pirate4x4.com/tech/billav...aft/index.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Tanksley wrote:
>
> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

Re: 1997 Wrangler Problem....
 

Did you convert to a constant velocity universal joints to
eliminate the severe oscillation that comes with anything over three
inch lift? http://www.pirate4x4.com/tech/billav...aft/index.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Tanksley wrote:
>
> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

Re: 1997 Wrangler Problem....
 

Did you convert to a constant velocity universal joints to
eliminate the severe oscillation that comes with anything over three
inch lift? http://www.pirate4x4.com/tech/billav...aft/index.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Tanksley wrote:
>
> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com

Re: 1997 Wrangler Problem....
 

The drive shaft is binding.

The lift has altered the angle of the pinion shaft relative to the angle of
the tcase uptput shaft. These two shafts need to be parallel, not pointed at
eash other. The corrective action is to lower the tcase (the parts should
have been included with the lift kit), or raise the pinion, or a combination
of the two.





"Brian Tanksley" <Briantanksley@aol.com> wrote in message
news:6687caee.0406241537.2ea4d54f@posting.google.c om...
> Hello all. I recently had a Pro Comp Stage II 4 inch suspension lift
> installed on my 1997 Wrangler. Now, when I accelerate, I feel a
> bumping noise underneath my feet. It only happens upon innitial
> acceleration and is worse when on an incline. I took it to my local
> repair shop and they are stumped. They checked the u joints and they
> were fine. They removed each drive shaft and the mechanic said with
> the rear shaft removed, that he didn't feel the bumping anymore. It
> did this a little before the lift kit but now it's really bad. It
> seems worse when I turn left upon acceleration. Any idea's? Thanks in
> advance.
>
> Brian Tanksley
> Briantanksley@aol.com