Mallett owners or those with V8/AR5 - Pontiac Solstice Forum
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post #1 of 25 (permalink) Old 04-28-2016, 12:07 PM Thread Starter
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Mallett owners or those with V8/AR5

I would like some input from Mallett owners or those with a V8 and AR5 combination. I have a LS1/AR5 Solstice with the factory 3.91 rear end. First gear is useless. Can anyone with a different rear end gearing give me some feedback? I am considering 3.42 or 3.23 gears to make first gear useable. I appreciate your input.
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post #2 of 25 (permalink) Old 04-28-2016, 04:04 PM
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How does your car do launching in second? The 3.91 gives you 557 RPM at 5 MPH in second gear, the 2.73 gives you 645 in first.

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post #3 of 25 (permalink) Old 04-28-2016, 04:23 PM
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I have the 3.42 in mine and feel 1st is pretty much useless, except at low rpm's. I am considering the 3.23's also. I am not racing mine, but would like to be able to use 1st gear. Still working on figuring mine out, so not much help to anyone.
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Last edited by skersfan; 04-28-2016 at 06:10 PM.
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post #4 of 25 (permalink) Old 04-28-2016, 04:38 PM
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I have the stock GXP differential. The first five gears are pretty low but very functional.

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post #5 of 25 (permalink) Old 04-28-2016, 10:18 PM
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Not sure what ratios in my CTS diff. The T56 is not much good in first, but workable. Find I can drive in 4th through town at about 40mph so, have considered a taller ratio diff.

On the other hand, I cruise at around 2000 rpm at 70 mph in 6th and need to downshift to 5th if the speed limit calls for 55mph

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post #6 of 25 (permalink) Old 04-29-2016, 05:38 AM
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I had the factory rear ratio in my car when I got it. Had it changed to 3.42. Wished I went with 3.23.
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post #7 of 25 (permalink) Old 04-29-2016, 07:10 AM
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Quote:
Originally Posted by King-Oka View Post
Not sure what ratios in my CTS diff. The T56 is not much good in first, but workable. Find I can drive in 4th through town at about 40mph so, have considered a taller ratio diff.

On the other hand, I cruise at around 2000 rpm at 70 mph in 6th and need to downshift to 5th if the speed limit calls for 55mph
Although the relative span from 1st to 6th in the T56 is roughly the same as the relative span from 1st to 5th in the AR5, depending on which T56 you have the overall range of ratios is either a little or a lot taller.
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post #8 of 25 (permalink) Old 04-29-2016, 01:05 PM
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3.23 would be most beneficial.
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post #9 of 25 (permalink) Old 05-03-2016, 11:51 AM Thread Starter
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Thanks for your input. I am looking for a 3.23 CTS rear carrier from a local boneyard and adding a Quaife differential to that as 3.23s don't appear to come with a LSD.
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post #10 of 25 (permalink) Old 05-03-2016, 12:22 PM
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I have 3.23 with LSD and it is great. All of my gears are usable and I am barely over 2000rpm at 80 mph. I am quite able to smoke the tires in first and second gear, if I had a reason. (which I don,t). Here is a video of Dave from DDM testing my car with 3.23 differential.

https://www.youtube.com/watch?v=trvI32NgLZY

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06 SLY, LS3/480 V8, Tremec 6 speed, 3.23 positraction Getrag diff, custom stainless steel true dual exhaust system w/high flow cats, carbon fiber rear valance, red pc calipers, DDM Works Stage 1 brake upgrade, garage door opener, custom fuse box cover, Red anodized engine covers, DDM Works console, Lambo doors, clear bra, DDM Works red racing backbone, DDM Works red pro beam, twin horns, Opel GT radio antenna, upgraded tires, conv top cover, de-badged, chrome rings around A/C controls

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post #11 of 25 (permalink) Old 05-03-2016, 12:22 PM
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GM Part Number 25978162 is supposed to be a G80 option (LSD) 3.23:1 drive axle.

John
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post #12 of 25 (permalink) Old 05-03-2016, 06:56 PM
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Thanks for that information JohnWR. I will check with my dealer and see if I can order one as soon as I get the smog and registration done.
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post #13 of 25 (permalink) Old 05-04-2016, 06:28 AM
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Would be able to find the CTS/STS/etc rear end on Ebay for $300 or so.

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post #14 of 25 (permalink) Old 07-11-2016, 02:18 PM
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Quote:
Originally Posted by Red Thunder View Post
Thanks for your input. I am looking for a 3.23 CTS rear carrier from a local boneyard and adding a Quaife differential to that as 3.23s don't appear to come with a LSD.
The Hollander # is 440-01415 3.23 GU5 with LSD G80.
Search Google or eBay w/ description. There are also GU5 w/o G80.
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post #15 of 25 (permalink) Old 07-21-2016, 09:06 AM
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I'm curious how Mallet connected the AR5 to the LS engine. What adapter or bell housing did they use? Any pics of that?
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