Detroit Trutrac 3.07 / 35? - JeepForum.com

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post #1 of 21 Old 12-14-2005, 11:19 AM Thread Starter
BEANS
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Detroit Trutrac 3.07 / 35?

I'm being told by Quadratec that Detroit trutrac is not made for a Dana 35 / 3.07.
is this true?
If this not true, what are the part numbers for a Detroit Trutrac for a jeep with 3.07 ring and pinon for the front 30 and rear 35?


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post #2 of 21 Old 12-14-2005, 11:23 AM
Wheelin98TJ
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Sorry, I can't help you with your question, but I have to ask...

Why are you sticking with those crappy 3.07s?
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post #3 of 21 Old 12-14-2005, 11:26 AM
Jerry Bransford
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Quote:
Originally Posted by Wheelin98TJ
Why are you sticking with those crappy 3.07s?
I agree. Onroad or especially offroad, a lower ratio is highly recommended.

It doesn't appear that Tractech makes a Detroit Truetrac for your 3.07 anyway according to their chart at http://www.tractech.com/docs/TT-List-LTPM1004.pdf

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post #4 of 21 Old 12-14-2005, 11:40 AM Thread Starter
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Quote:
Originally Posted by Jerry Bransford
I agree. Onroad or especially offroad, a lower ratio is highly recommended.

It doesn't appear that Tractech makes a Detroit Truetrac for your 3.07 anyway according to their chart at http://www.tractech.com/docs/TT-List-LTPM1004.pdf
Your right I should go to a 3.55 rear & front I'm running 32" tires. I was talking to Quadratec and was surprised to find out that Tractech doe's not carry a limited slip for a 3.07! What if you are running stock tires

2001 SPORT 4.0 AUTO EMPTY GAS TANK
2 1/2"O.M.E. 1"Body LIFT
33" DUNLAP'S
JSK QUICK DISCONNECTS THAT I'LL NEVER DISCONNECT
LIMITED SLIP WITH 4.11'S FRONT AND BACK
S.Y.E
7'6" SNOWAY POLY PLOW
Elect Radiator fan on a Delta control
Borla Header, Catback Exhaust By Volant 304SS
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post #5 of 21 Old 12-14-2005, 11:42 AM
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If your gonna pay the money for a locker/limited slip, you should regear at the same time.

.02

The above post is my opinion and I have no facts to prove it... :)~


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post #6 of 21 Old 12-14-2005, 11:47 AM
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Quote:
Originally Posted by BEANS
Your right I should go to a 3.55 rear & front I'm running 32" tires. I was talking to Quadratec and was surprised to find out that Tractech doe's not carry a limited slip for a 3.07! What if you are running stock tires
3.55 is still not low enough.

I'd recommend 4.10, maybe 4.56 w/ a 5-spd or if you think you may go bigger in the future.
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post #7 of 21 Old 12-14-2005, 12:05 PM Thread Starter
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Quote:
Originally Posted by Wheelin98TJ
3.55 is still not low enough.

I'd recommend 4.10, maybe 4.56 w/ a 5-spd or if you think you may go bigger in the future.
I just got off the phone with Quadratec. They are very helpful.
I'm going to 3.73 gears front and rear. 32" tires are large enough for what I use the Jeep for. The trans. is a 3 speed auto. I'm putting Truetracs front and rear.
I'm on my way to pick everything up in West Chester.
What do you think?
Thanks for the help!

2001 SPORT 4.0 AUTO EMPTY GAS TANK
2 1/2"O.M.E. 1"Body LIFT
33" DUNLAP'S
JSK QUICK DISCONNECTS THAT I'LL NEVER DISCONNECT
LIMITED SLIP WITH 4.11'S FRONT AND BACK
S.Y.E
7'6" SNOWAY POLY PLOW
Elect Radiator fan on a Delta control
Borla Header, Catback Exhaust By Volant 304SS
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post #8 of 21 Old 12-14-2005, 12:10 PM
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Quote:
Originally Posted by BEANS
I just got off the phone with Quadratec. They are very helpful.
I'm going to 3.73 gears front and rear. 32" tires are large enough for what I use the Jeep for. The trans. is a 3 speed auto. I'm putting Truetracs front and rear.
What do you think?
Go with 4.10. You'll regret it later if you don't.

3.73 is a stock ratio that is best for 30" and smaller tires.

I have nothing against Quadratec, but you can do better for both service and pricing. You should try some of the vendors here. Some have some pretty good deals for forum members.
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post #9 of 21 Old 12-14-2005, 12:18 PM Thread Starter
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Quote:
Originally Posted by Wheelin98TJ
Go with 4.10. You'll regret it later if you don't.

3.73 is a stock ratio that is best for 30" and smaller tires.

I have nothing against Quadratec, but you can do better for both service and pricing. You should try some of the vendors here. Some have some pretty good deals for forum members.
3.73 with 32" tires will run about 2500 rpms with my automatic
4.10 with 32" tires will be runnin 2800 rpms!
As far as service I'm installing all this.
Price is close without shipping I can pick everything up.

2001 SPORT 4.0 AUTO EMPTY GAS TANK
2 1/2"O.M.E. 1"Body LIFT
33" DUNLAP'S
JSK QUICK DISCONNECTS THAT I'LL NEVER DISCONNECT
LIMITED SLIP WITH 4.11'S FRONT AND BACK
S.Y.E
7'6" SNOWAY POLY PLOW
Elect Radiator fan on a Delta control
Borla Header, Catback Exhaust By Volant 304SS

Last edited by BEANS; 12-14-2005 at 12:28 PM.
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post #10 of 21 Old 12-14-2005, 12:19 PM
Jerry Bransford
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Quote:
Originally Posted by BEANS
I just got off the phone with Quadratec. They are very helpful.
I'm going to 3.73 gears front and rear. 32" tires are large enough for what I use the Jeep for. The trans. is a 3 speed auto. I'm putting Truetracs front and rear.
I'm on my way to pick everything up in West Chester.
What do you think?
Thanks for the help!
Their recommendation to use 3.73 gearing for 32" tires is another example of just plain incorrect advice being given by Quadatrac, likely from a salesman who has little actual offroad experience. 3.73 is the most common ratio Jeep installs on TJs that come with 30" tires, not 32" tires. For larger tires than 30", you need a lower ratio and for 32" tires, I'd go with 4.10. If you think the "bug" might someday bite you and you might ever go with 33" tires, I'd go with 4.56.

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post #11 of 21 Old 12-14-2005, 12:24 PM Thread Starter
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Quote:
Originally Posted by Jerry Bransford
Their recommendation to use 3.73 gearing for 32" tires is another example of just plain incorrect advice being given by Quadatrac, likely from a salesman who has little actual offroad experience. 3.73 is the most common ratio Jeep installs on TJs that come with 30" tires, not 32" tires. For larger tires than 30", you need a lower ratio and for 32" tires, I'd go with 4.10. If you think the "bug" might someday bite you and you might ever go with 33" tires, I'd go with 4.56.

Ok Ok I'll go with 4.11s. I'm glad I asked. This guy is gona Sh*t when I call him back to change the order.
Again thanks for the help

2001 SPORT 4.0 AUTO EMPTY GAS TANK
2 1/2"O.M.E. 1"Body LIFT
33" DUNLAP'S
JSK QUICK DISCONNECTS THAT I'LL NEVER DISCONNECT
LIMITED SLIP WITH 4.11'S FRONT AND BACK
S.Y.E
7'6" SNOWAY POLY PLOW
Elect Radiator fan on a Delta control
Borla Header, Catback Exhaust By Volant 304SS
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post #12 of 21 Old 12-14-2005, 12:29 PM
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Quote:
Originally Posted by BEANS
3.73 with 32" tires will run about 2500 rpms with my automatic
4.10 with 32" tires will be runnin 2800 rpms!....
2.800 RPMs at cruising speed is perfectly fine.
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post #13 of 21 Old 12-14-2005, 12:29 PM
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Quote:
Originally Posted by BEANS
Ok Ok I'll go with 4.11s. I'm glad I asked. This guy is gona Sh*t when I call him back to change the order.
Again thanks for the help
Good decision. Just don't let him talk you back into 3.73 as he may try to do since he'll actually have to do a little extra work to change your order.

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post #14 of 21 Old 12-14-2005, 02:54 PM
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Quote:
Originally Posted by BEANS
3.73 with 32" tires will run about 2500 rpms with my automatic
4.10 with 32" tires will be runnin 2800 rpms!
As far as service I'm installing all this.
Price is close without shipping I can pick everything up.
Your installing all of this?


As far as the rpms go i think my 4 banger cruises at about 3000 rpms at 70ish.
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post #15 of 21 Old 12-14-2005, 02:57 PM
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Beans, if you've never installed R&P gears before, I hope you have a friend that knows how to get them installed correctly there to help guide you.

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