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weasel
GenIII
 
4/28/2001
21:24:09
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 Subject: 3.55 --> 3.92
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Message:
What is the best way to convert a 3.55 diff to a 3.92. Thanx in advance.
Adam
2000 SLT CC 4x2 4.7 3.55 LSD
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Ken1
Unregistered
4/28/2001
21:53:17
| RE: 3.55 --> 3.92
IP: Logged
Message:
Find whole rearend in local wrecking yard much easier.
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matt
Mechanic
4/28/2001
23:48:27
| RE: 3.55 --> 3.92
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Message:
Take the diff apart and replace the ring gear and the pinion gear with the 3.92. You have to know how to set up a diff though for proper backlash and pinion spacing. Also if it is 4x you must do front diff also
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RonW
*GenIII*
4/29/2001
14:16:12
| RE: 3.55 --> 3.92
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Message:
If you've never done this before my suggestion is to go to a dirveline or differential specialist. ~$600 parts and labor. It's about 50/50 parts/labor. Make sure the place is reputable, does high performance drivelines etc. If nothing else, make sure the pinion bearings are replaced with new ones. Plus a lot of people don't save the old gears but they're yours. Keep them. You never know.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
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weasel
GenIII
4/29/2001
23:54:08
| RE: 3.55 --> 3.92
IP: Logged
Message:
$600 huh thats steep. Wish I would of know about this when i bought the truck, would of looked for the 3.92 then. Also could any one tell me the differences between the three auto tranys that come on the 2000s (42,44,46) I believe mine is a 44RE
Adam
2000 SLT CC 4x2 4.7 3.55 LSD
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kicker01
Unregistered
JOIN HERE
5/22/2001
00:51:16
| RE: 3.55 --> 3.92
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Message:
i think the 46re tranny is for the 5.9 engine
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Dan Ingler
Unregistered
JOIN HERE
5/22/2001
09:12:45
| RE: 3.55 --> 3.92
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Message:
What are the performance benefits of switching gear ratios? Has anyone checked 1/4 mile times for both and compared? What about highway driving, will I be running 70 mph at 4500 rpm!!?!
I am just wondering about performance vs. cost
Dan
'99 3.9 CC 2WD
JBA, K&N GEN2, MSD DIG 6, JET Stage 2, Airaid TB spacer (don't laught Bernd, I know it doesn't work, I'm stuck with it but I do dig the little whistle it makes!!!!)
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intense99dak
Unregistered
JOIN HERE
5/22/2001
09:32:20
| RE: 3.55 --> 3.92
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Message:
I can't speak for 1/4 mile times as I have to go down the track. However, I can tell you that the difference between the 3:55's and 3:92's is night and day.
The "performance" gains are very noticeable no matter what the rpm range and will snap your head back whether it's off the line or going 80. It's a lot of fun to go down the road popping the throttle and almost lifting the front tires ;-)
And as for on the highway, my engine is turning 3000 rpm's at 85 mph. About 300 rpm higher than with the old 3:55's.
Chuck Robbins
'99 Dakota Sport
www.intense99dak.com
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Glen
Gen III
5/22/2001
12:12:34
| RE: 3.55 --> 3.92
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Message:
I cant belive it, i went to my dealer last night, and asked how much it would cost to swap out my gears for some 3.92s, he said "$645 before labor". Now that is expensive, i need to find a good shop and have them do it for me. Im just starting to lose faith in my '5 star' dealer...
'01, CC, SLT, 4.7, Auto, 3.55 LS
Gibson single catback. Z-tube.
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CyberWolf
Unregistered
JOIN HERE
5/22/2001
14:18:49
| RE: 3.55 --> 3.92
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Message:
Check out the 4x4 shops in your area. They do gear changes all day long. They are also usually cheaper than race shops.
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MACE
Unregistered
JOIN HERE
5/22/2001
15:17:10
| RE: 3.55 --> 3.92
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Message:
FWIW, my 2001 4.7/AWD/Auto/T&H/Limited Slip with 3.92 pulls exactly 2000 RPM at 60 MPH.
To be honest, I thought the RPMs would be higher at highway speed with the 3.92
Just hit 500 miles, time for the right foot and go pedal to become a bit more intimate with each other!
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Horbedarn
Gen I
5/24/2001
00:23:59
| RE: 3.55 --> 3.92
IP: Logged
Message:
What about going from 3.55 to 4.1 gears? Is there much advantage from 3.92? What kind of rpms do you run?
Thanks
2000, CC, SLT, 4x4, 4.7, 3.55, Auto
Exhaust, Air Intake, TBI Spacer
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CyberWolf
Dodge Dakota
5/24/2001
11:21:24
| RE: 3.55 --> 3.92
IP: Logged
Message:
you probably wouldnt notice the difference between the 3.92 and the 4.10.
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