5 posts - 3 authors - Last post: Mar 4, 20053.42 VS. 3.73 Gearing Questions: TrailBlazer | Trailblazer EXT Car Forums.

12 posts - 11 authors - Last post: Sep 13, 2004Hey, whish is the best route to take with the Colorado, 3.42 or 3.73 gear ratio? I have been told that 3.42 will give me the best gas mileage but .

19 posts - 9 authors - Last post: Jun 1, 20072nd. is there going to be a big differance between a 3.42 & 3.73 ratios being its 90% street i'm a little conserned about gas milage but if its .

10 posts - 10 authors - Last post: Jan 22, 2008I currently pull my PS205 with chevy 5.3L and 3.42 rear end. Does the 3.73 rear end have significant difference in towing ability and non-towing .

2 posts - 2 authors - Last post: Jan 15, 2007Does anyone have the numbers on torque increase by swaping from 3.42 axle to 3.73? What about MPG decrease?

37 posts - 21 authors - Last post: Nov 28, 2009[Archive] 3.08, 3.42 or 3.73 posi..?? Transmission & Driveline Topics.

20 posts - 11 authors - Last post: May 17, 2010Has anyone swapped to from 3.73 to 3.42 with the G56 & a 5.9? 03-07 3rd Gen.

8 posts - 7 authors - Last post: Oct 18, 2006I've owned both an 03 RC with the 3.73 and a 06 CC with the 3.42's. .mileage is better with the 3.42's especially on the highway obviously. .

6 posts - 5 authors - Last post: Jul 24, 2009I'm looking to purchase a Chevy Suburban with a 5.3L V8 to tow a 5000 lb boat, motor and trailer. I understand that a 3.73 axle is better for .

15 posts - 8 authors - Last post: Mar 3Difference in MPG between 3.42 & 3.73 gear RAM 2500-3500 HD Discussion.

13 posts - 6 authors - Last post: Jul 15, 2010I see that JamesC has a thread showing the difference between the 3.42 and 3 .

15 posts - 5 authors - Last post: Jun 1, 2010I have a base model 95 fleetwood with the 2.56 gears. At some point I would .

Oct 1, 2011 – My gas mileage is also close to the same as it originally was. I am very satisfied with my 3.73's, but I have heard good things about 3.42's as .

3.42, 3500 4000, 3.08 3.42, 6400 7400, 3.42 3.73, 4400 5400, 3.42 . 3.73. 8, 5900 6900, 3.42 3.73, 6900 7900, 3.42 3.73. 1500 4x4(2), Regular Cab, 6 1/2 .

8 answers - Jan 19, 2007Top answer: Seether, My bone stock 4.3, 262 incher 98 S-10 four wheel drive Chevy came from GM with 3.73 gears. I've driven it from NY to NC and back and .

33 posts - 12 authors - Last post: Feb 9Is it 3.08, 3.42, or 3.73? I've heard of some swapping their 3.08's for 3.42's in their impalas but I have a hard time believing GM would call .

4 posts - 3 authorsIs there any difference between the 3.73s and 3.42s at the track with an auto car? I would like to gear the car down for next year but im not sure witch would be .

Aug 7, 2011 – Hey guys,I got a 2010 silverado with 6-speed, 5.3 and 3.08 gears I pull a 5000 boat, and cattle trailer pushing 6000lbs. I was told this would not .

10 posts - 8 authors - Last post: May 16, 2010Ok guys I'm ordering a new 6.2 silverado normally I would get the 3.42 with an old a4 tranny. Now that we have a a6 would 3.73 be better .

36 posts - 10 authors - Last post: Mar 16, 2010I thinking about possibly going from 3.42's to 3.73's. What needs to be replaced and how much will it cost? From what I know, most cars only .

10 posts - 3 authors - Last post: Jan 24Hi yall, it has been a long time since I have been on the forum, life has just been too busy!!! But I digress. I have found myself in an interesting.

20 posts - 19 authors - Last post: Oct 15, 2007Is there a big performance difference between the 3.42's and 3.73 gears. This is a daily driver, which has 2.73's now so what gear would you .

7 posts - 4 authors - Last post: Oct 27, 2006OK, I know the answer for this question can range greatly. This upcoming spring. I am going to be swapping my 3.42's out for 3.73's.

4 posts - 3 authors - Last post: Dec 20, 2007Just tossing this out there. I need a ring and pinion for a GM 8.5" 10 bolt diff. 30 spline. The pinion MUST accept - or preferably already have-

Jul 6, 2003 – Boat and trailer weigh less than 3000 pounds. I know the 3.73 rear end is better, but will the 3.42 be okay. The Tahoe will have a 5.3 or 5.7 V-8. .

7 posts - 6 authors - Last post: Jan 13Yank 3200 and 3.42/3.73 gear are on there way Performance Results.

9 posts - 5 authors - Last post: May 7, 2009i have the stock 3.42 gears or at least i think the stock gear is what is in there, my question is how much difference would i see by replacing .

12 posts - 8 authors - Last post: Dec 11, 2006Hi Guys Going to rebuild my rear and was trying to decide what ratio to go with. I want a good solid take off but dont want.

7 posts - 6 authors - Last post: Mar 16, 2009I'm want to change my G80 3.42 gears to 3.73. Anyone know of a competent .

5 posts - 3 authors - Last post: 6 days agoTitle says it all. I've been on the fence about purchasing a brand new TrueTrac carrier for my rear one-legger 10-bolt 1997 Sierra. I think I'd lean .

10 posts - 9 authors - Last post: Jul 11, 2003Hi, I am looking at getting a used Chevrolet truck w/ 5.7L eng. and I can't decide what gear ratio to go with. I will be towing a 24' camper at .

Mar 11, 2011 – I have a 2010 Silverado LTZ with the 6.2. I currently have a 3.42 rear end. Is it hard to upgrade to a 3.73 or more and what kind of costs would I .

Jun 30, 2011 – All being equal, which 2011 Silverado 6.2L wins the 1/4 mile, one with 3.42 or 3.73 rear gears 6L80 Trans?

c (a) barley c 3.63 3.57 3.47 3.65 3.89 3.73 3.77 3.90 3.78 3.82 3.83 3.71 4.10 . 3.50 3.42 4.36 3.71 3.42 3.95 4.06 3.73 3.92 3.99 3.70 3.88 3.71 3.62 3.74 3.42 .

I've got a 1992 3/4 ton GMC with the 5.7L TBI, 125in wheelbase, 700R4 Automatic Tranny and 3.42 gears in the rear. I have a hard time with hills in the Ozarks, .

Axle Ratio, 4.56, 4.10, 3.73, 3.55, 3.42, 3.08. Trans Ratio, Final Drive Ratio . Axle Ratio, 4.88, 4.56, 4.10, 3.73, 3.42, 3.23. Trans Ratio, Final Drive Ratio .

4.56, 14 BOLT 9.5" RATIOS: 3.23, 3.42, 3.73, 4.10, 4.56, 4.88 3.23, 3.42, 3.73, 4.10, 4.56, 4.88. 10 BOLT 8.5" RATIOS: 3.23, 3.55, 3.91, 4.10, 4.56 2.73, 2.93, 3.08 .

12 posts - 6 authors - Last post: Jan 2, 2010If I cannot find a used 3.73 I am going to get a new gear for my 11.50 rear end. I will either get a 3.73 kit or the 3.42 which they now make for .

3 posts - 3 authors - Last post: Jul 13I have a 2006 silverado 1500 with 5.3L Vortec and 3.42 gears. Towing is a .

12 posts - 9 authors - Last post: Aug 24, 2006and was wondering what sort of priority i should place on finding a used one with a 3.73 ratio as opposed to the 3.42. I know it would be better, .

15 posts - 10 authors - Last post: May 4, 2006I know 3.73's are gonna give me better performance, but have heard that 3.42s are much more durable. Is the performance going to be that big .

3.63 3.57 3.47 3.65 3.89 3.73 3.77 3.90 3.78 3.82 3.83 3.71 4.10 4.02 4.13 . 3.10 3.78 3.42 3.66 3.64 3.83 3.73 3.72 3.65 3.50 3.32 2.95 3.34 3.51 3.17 .

15 posts - 8 authors - Last post: Jul 16, 2006Let me know how it goes I too have 3.42 and want to go to 3.73. Let me know the difference in pick up performance. the locker aka locking diff, .

14 posts - 7 authors - Last post: Feb 6Re: 7.5 or 7.65 3.42s or 3.73s? in 1985 SS monte. Post by -83MONTESS- on Tue Jan 04, 2011 5:28 pm. Im gettin ready to (hopefully) buy a .

20 posts - 9 authors - Last post: Nov 26, 2005Last weekend I put a T56 in my originally automatic TA. The rear end is still a 2.73 and it sucks! (of course). I'll soon install a shorter ratio but.

30 posts - 14 authors - Last post: Jun 8, 2010I have a stock 5.7 TPI with minor mods, 3" exhaust, headers, ported plenum, chip, afpr. I currently have a B-W with 3.27gears. I would like more.

12 posts - 8 authors - Last post: Sep 29, 2010I've read the sticky under drivetrain section, but the opionion seems inconclusive. Stay with the 3.08 or go to 3.42 or 3.73? I do like to go fast . .

7 posts - 5 authors - Last post: Mar 14I have found locally a 2500 HD, diesel with a 3.73 gear and a 3500 HD (SRW) with a 3.42 gear and I was wondering what would be the best .

10 posts - 6 authors - Last post: Apr 2, 2009been doing a lot of reading on MPG and gear ratios - did a search and not much info on anyone "actually" installing 3.42 or 3.73 before i get .

15 posts - 3 authors - Last post: Oct 7, 2010You have to be sure whatever gear you buy fits a 2 series carrier, I believe that's what Zane is referring too. I run a 3800 Edge converter(TH400) .

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