Hey Guys,

I have a 01 XJ, stock Upcountry Pkg, 5sp tranny with the basic steel
wheels. I *think* that this means that, like the OP in this conversation,
I have the D30/35 3.56 differentials.

I've changed my tires to beef up the sidewalls and clearance for my
occasional forays into rock, such as one might encounter on the passes of
Colorado. (I do a bit of backcountry skiing in the Springtime; this took
me over Cinnamon Pass and to Ophir Pass, e.g., last season just after both
roads were opened.) These new tires are 30x9.5LT tires, and they've
changed my driveline ratio enough that I'm having trouble maintaining my
engine revs on the mountain roads I regularly drive, so I'm considering a
differential gear ratio change.

Now for the questions part:

(1) What is the recommended source/parts manufacturer for what I'm trying
to do?

(2) Assuming I do go through with things, does anyone have a
recommendation on how far to go? Does a 4:10 differential make sense for
my application? I probably only rarely drive over 80mph, but I'd rather
not have to be at 3k rpm to achieve this speed on the highway for long
timeframes. Also, will a 4:10 even fit in my diff cases?

(3) My rear differential is of the stock pseudo limited slip variety
(Traclok?). Does it make sense at this time to consider going with a more
capable limited slip product? How about on the front too?

Many thanks to all for any suggestions you might have...

cheers,
john

 

Repost your answers:
http://groups.google.com/groups?hl=e...r%3D%26hl%3Den
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

John Red-Horse wrote:
>
> Hey Guys,
>
> I have a 01 XJ, stock Upcountry Pkg, 5sp tranny with the basic steel
> wheels. I *think* that this means that, like the OP in this conversation,
> I have the D30/35 3.56 differentials.
>
> I've changed my tires to beef up the sidewalls and clearance for my
> occasional forays into rock, such as one might encounter on the passes of
> Colorado. (I do a bit of backcountry skiing in the Springtime; this took
> me over Cinnamon Pass and to Ophir Pass, e.g., last season just after both
> roads were opened.) These new tires are 30x9.5LT tires, and they've
> changed my driveline ratio enough that I'm having trouble maintaining my
> engine revs on the mountain roads I regularly drive, so I'm considering a
> differential gear ratio change.
>
> Now for the questions part:
>
> (1) What is the recommended source/parts manufacturer for what I'm trying
> to do?
>
> (2) Assuming I do go through with things, does anyone have a
> recommendation on how far to go? Does a 4:10 differential make sense for
> my application? I probably only rarely drive over 80mph, but I'd rather
> not have to be at 3k rpm to achieve this speed on the highway for long
> timeframes. Also, will a 4:10 even fit in my diff cases?
>
> (3) My rear differential is of the stock pseudo limited slip variety
> (Traclok?). Does it make sense at this time to consider going with a more
> capable limited slip product? How about on the front too?
>
> Many thanks to all for any suggestions you might have...
>
> cheers,
> john

 

Repost your answers:
http://groups.google.com/groups?hl=e...r%3D%26hl%3Den
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

John Red-Horse wrote:
>
> Hey Guys,
>
> I have a 01 XJ, stock Upcountry Pkg, 5sp tranny with the basic steel
> wheels. I *think* that this means that, like the OP in this conversation,
> I have the D30/35 3.56 differentials.
>
> I've changed my tires to beef up the sidewalls and clearance for my
> occasional forays into rock, such as one might encounter on the passes of
> Colorado. (I do a bit of backcountry skiing in the Springtime; this took
> me over Cinnamon Pass and to Ophir Pass, e.g., last season just after both
> roads were opened.) These new tires are 30x9.5LT tires, and they've
> changed my driveline ratio enough that I'm having trouble maintaining my
> engine revs on the mountain roads I regularly drive, so I'm considering a
> differential gear ratio change.
>
> Now for the questions part:
>
> (1) What is the recommended source/parts manufacturer for what I'm trying
> to do?
>
> (2) Assuming I do go through with things, does anyone have a
> recommendation on how far to go? Does a 4:10 differential make sense for
> my application? I probably only rarely drive over 80mph, but I'd rather
> not have to be at 3k rpm to achieve this speed on the highway for long
> timeframes. Also, will a 4:10 even fit in my diff cases?
>
> (3) My rear differential is of the stock pseudo limited slip variety
> (Traclok?). Does it make sense at this time to consider going with a more
> capable limited slip product? How about on the front too?
>
> Many thanks to all for any suggestions you might have...
>
> cheers,
> john

 

Repost your answers:
http://groups.google.com/groups?hl=e...r%3D%26hl%3Den
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

John Red-Horse wrote:
>
> Hey Guys,
>
> I have a 01 XJ, stock Upcountry Pkg, 5sp tranny with the basic steel
> wheels. I *think* that this means that, like the OP in this conversation,
> I have the D30/35 3.56 differentials.
>
> I've changed my tires to beef up the sidewalls and clearance for my
> occasional forays into rock, such as one might encounter on the passes of
> Colorado. (I do a bit of backcountry skiing in the Springtime; this took
> me over Cinnamon Pass and to Ophir Pass, e.g., last season just after both
> roads were opened.) These new tires are 30x9.5LT tires, and they've
> changed my driveline ratio enough that I'm having trouble maintaining my
> engine revs on the mountain roads I regularly drive, so I'm considering a
> differential gear ratio change.
>
> Now for the questions part:
>
> (1) What is the recommended source/parts manufacturer for what I'm trying
> to do?
>
> (2) Assuming I do go through with things, does anyone have a
> recommendation on how far to go? Does a 4:10 differential make sense for
> my application? I probably only rarely drive over 80mph, but I'd rather
> not have to be at 3k rpm to achieve this speed on the highway for long
> timeframes. Also, will a 4:10 even fit in my diff cases?
>
> (3) My rear differential is of the stock pseudo limited slip variety
> (Traclok?). Does it make sense at this time to consider going with a more
> capable limited slip product? How about on the front too?
>
> Many thanks to all for any suggestions you might have...
>
> cheers,
> john

 

Hey Bill,

In article <4004652C.5072B755@***.net>, ----------@***.net wrote:
> Repost your answers:
>

I'm very sorry for ignoring your original post. I have a good reason: I
never saw it on my default newsserver.

I'll take a look...

cheers,
john

 

Hey Bill,

In article <4004652C.5072B755@***.net>, ----------@***.net wrote:
> Repost your answers:
>

I'm very sorry for ignoring your original post. I have a good reason: I
never saw it on my default newsserver.

I'll take a look...

cheers,
john

 

Hey Bill,

In article <4004652C.5072B755@***.net>, ----------@***.net wrote:
> Repost your answers:
>

I'm very sorry for ignoring your original post. I have a good reason: I
never saw it on my default newsserver.

I'll take a look...

cheers,
john