3.29 Gear conversion Sanity Check : Performance & Brainstorming

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3.29 Gear conversion Sanity Check

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Speedster400

Post subject: 3.29 Gear conversion Sanity Check

Posted: Fri May 22, 2015 8:04 am

GXP Member

Joined: Thu May 22, 2008 10:08 pm
Posts: 238
Location: Detroit, MI
Year and Trim: 1996 Bonneville S/SE

I am working on upgrading the 4t65 to the 3.29 diff that i will be using for my 4t60 to 65 swap on the 96 and finally started looking at the programing for it. Using a DHP, the three table that i have for gear ratio are:
Calculated Pulses per rev
Drive sprocket ratio
Calculated pulses per mile.

The values that seem to be used with the 3.29 overall on the GP's are:
Calculated Pulses per rev: 25
Drive sprocket ratio: 1.0 (same as stock)
Calculated pulses per mile: 23310

Does this seem to make sense for the bonneville? Or am I missing somthing.

Thanks for your help

_________________
Dave

INFO FOR CONVERTING SE TO SSE BODY HERE=>>http://www.pontiacbonnevilleclub.com/forum/detailing-appearance/topic39372.html
http://www.pontiacbonnevilleclub.com/forum/performance-brainstorming/topic43633.html
2002 Pro Stock Pontiac Firebird**GM 399 Splayed Valve Engine
1996 Pontiac Bonneville SE/SSE **100% Transformation from SE to SSE Complete**Lowered 2.00inches too**

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Jrs3800

Post subject: Re: 3.29 Gear conversion Sanity Check

Posted: Mon May 25, 2015 12:32 pm

Retired Admin/Techinfo Admin

Joined: Mon May 19, 2008 2:08 pm
Posts: 26009
Location: Space Coast, or at least it used to be
Year and Trim: 03 SLE, 95 SE, 95 TS SE

That actually sounds right, I noticed that in all of the 4T65E tunes.. Does your new diff have the reluctor on it?

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Speedster400

Post subject: Re: 3.29 Gear conversion Sanity Check

Posted: Sun May 31, 2015 7:50 pm

GXP Member

Joined: Thu May 22, 2008 10:08 pm
Posts: 238
Location: Detroit, MI
Year and Trim: 1996 Bonneville S/SE

Yes, the new diff came with the reluctor. Sorry about the late reply.

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Dave

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9D9SSEi

Post subject: Re: 3.29 Gear conversion Sanity Check

Posted: Tue Jun 02, 2015 2:20 am

SE Member

Joined: Thu Mar 26, 2015 12:42 pm
Posts: 12
Year and Trim: 1999 SSEi

If you change those over and still have shifting issues, you'll have to open your bin in tiny tuner, along with a similar year/model that has a 3.29 trans, and swap over the values from those tables you can't see in dhp.

After swapping all the trans stuff in dhp from a '99 ssei to a '99 SSE bin, I was still having hard 1-2 shifts. Swapped the rest of the tables over from the ssei bin in TT, and it was good to go.

_________________
'99 SSEi: L36, XP/105's/titanium retainers, HAI, 3.5, plog, 3" dp, DHP
To be installed: SSIC and 3.2

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