How do I determine my rear axle size
#31
recovering chevy owner
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JMC...note that I do have the 7700 now...in 2000/2001 you could not get the 7700 in a Screw or 4x4...only 2wd 139" wb Rcab and Scab...
Are you saying that an 01 F-150 Screw 4x4 6-lug will automatically be a 9.75 axle...???
If so that's good...if driver444 can get a truetrac for his 08 w/ 9.75 and I get on 01 with a 9.75 then I should have no problems getting a truetrac also...
YES/NO...
Help me simplify it...please...I might pop for one later this am if my options are clear...
Are you saying that an 01 F-150 Screw 4x4 6-lug will automatically be a 9.75 axle...???
If so that's good...if driver444 can get a truetrac for his 08 w/ 9.75 and I get on 01 with a 9.75 then I should have no problems getting a truetrac also...
YES/NO...
Help me simplify it...please...I might pop for one later this am if my options are clear...
Last edited by henry4rd; 05-13-2009 at 10:30 AM.
#32
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1997 -2004 Heritage had two lug bolt patterns. 5 bolt and 7 bolt. The 7 bolt axles had the 10.25 and the 5 bolt had either the 8.8 or 9.75 differential. There are no 6 bolt Screw trucks in the 97-04 Heritage models.
Regards
Jean Marc Chartier
Regards
Jean Marc Chartier
#33
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Okay, thanks for the help...
I went and looked at 2 different 01 screws yesterday...both had 5 lug wheels...3.55 l/s...rear diff cover had 12 bolts...axle code H9...
I am assuming that those rears are 9.75s and that installing a truetrac is no problem...
Also...the front suspensions have a-arms and "half-shaft" axles with cv joints...
Sweet...
My 7700 2wd has 30" tires and 3.73 gears...I have a 100k on that...about 30% highway...alot of which is towing light trailer in the mountains...IMO it's the perfect overall gearing...
The stock 01 4wd trucks I am looking at have 32" tires and 3.55...
My truck is like a race car for acceleration by comparison... lol...
So I figure if I get one of the Heritage 4x4s I will go to 4:10 gears with Truetrac in the rear...
My question is this...
When a 4x4 comes with Limited Slip diff...is it l/s in the rear and the front...or rear only with open front...
And does it matter what year...as in are they different in 04+ vs Heritage...
I went and looked at 2 different 01 screws yesterday...both had 5 lug wheels...3.55 l/s...rear diff cover had 12 bolts...axle code H9...
I am assuming that those rears are 9.75s and that installing a truetrac is no problem...
Also...the front suspensions have a-arms and "half-shaft" axles with cv joints...
Sweet...
My 7700 2wd has 30" tires and 3.73 gears...I have a 100k on that...about 30% highway...alot of which is towing light trailer in the mountains...IMO it's the perfect overall gearing...
The stock 01 4wd trucks I am looking at have 32" tires and 3.55...
My truck is like a race car for acceleration by comparison... lol...
So I figure if I get one of the Heritage 4x4s I will go to 4:10 gears with Truetrac in the rear...
My question is this...
When a 4x4 comes with Limited Slip diff...is it l/s in the rear and the front...or rear only with open front...
And does it matter what year...as in are they different in 04+ vs Heritage...
#34
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Location: Windsor,Ontario,Canada
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The factory configuration is always open differential in the front. All 97 to present models have a reverse cut 8.8 open differential in the front. IMHO a stock 4x4 with the LS rear is good enough for all but serious wheeling. 90% of successful wheeling is driver. Knowing what you can and cannot do with your truck is important. I would recommend that you leave your next 4x4 stock and wheel with it till you get to know it. Then you can decide what it needs based on your experience with it. Not mine or someone else's. You will not be loosing money if you wait to upgrade the diff later. So take your new truck and go out and get it stuck. How else will you learn its limits?
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