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Old Jul 4, 2002 | 06:55 PM
  #1  
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Default Gear and TC questions

I am thinking of installing a set of 3.42's or 3.73's, and a Super Yank 3500 TC, in my 98. What I want to know, is if I just install the TC first, do I have to do any re-programming, or does the re-programming only come when you do the gear swap? How can I tell which gear my car has? Also, has anyone gone from the 3.42's to the 3.73's, what kind of difference are you seeing? Thanks!! :cheers:
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Old Jul 4, 2002 | 09:01 PM
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Default Re: Gear and TC questions (kwik8racr)

I believe you'll need to reprogram. Check your glove box. If it has RPO G92, you have 3.15 gears, otherwise you have 2.73

Tom


[Modified by tscales, 7:02 PM 7/4/2002]
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Old Jul 4, 2002 | 09:18 PM
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Default Re: Gear and TC questions (tscales)

if you do both a TC and rear gears, I don'; think you can get around not reprograming.

What gears do you have now?





[Modified by Mike Mercury, 8:24 PM 7/4/2002]
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Old Jul 4, 2002 | 10:13 PM
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Default Re: Gear and TC questions (Mike Mercury)

I have the 3.42's installed in a prior 3.15 car. I am soon to put in a PT2400 converter and am not planning on any programming. My dealer tech has indicated he does not think we will need any adjustments. Should know in a week or so. Higher stalls above 3000 have needed some minor adjustments to the programming.
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Old Jul 5, 2002 | 12:45 AM
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Default Re: Gear and TC questions (KingTut)

Higher stalls above 3000 have needed some minor adjustments to the programming.
Hey Jim, keep us informed when you install the TC.
Are you currently running your 3.42's with the factory 3.15 program?
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Old Jul 5, 2002 | 12:04 PM
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Default Re: Gear and TC questions (kwik8racr)

Troy, if you do just the SY3500 first with your current gear, I don't think programming would be an absolute must. It would however be pretty loose w/ a 3.15 and even moreso with a 2.73. Given that, you might want to do some tuning relative to the clutch lockup and low throttle shift speeds to compensate depending on a) how you plan to have your programming done and b) how long and often you plan to drive the car like that. If you're trying to hold off programming work till you change gear, I think you should be able to get by (depending on how far out that is, how tolerant you are of the looseness, and how hilly the local terrain is.) It's worth a visit w/ Mike @ Yank if possible.

Also, has anyone gone from the 3.42's to the 3.73's, what kind of difference are you seeing?
Are you thinking about putting 3.73s in your stick and putting that 3.42 in your auto?
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Old Jul 5, 2002 | 12:13 PM
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Default Re: Gear and TC questions (ToplessTexan)

With a MN6 the main reason for reprograming is to correct the speedo. With the A4's it's alot more complicated. You can expect to use about one more gallon per mile & pick up an honest .3 secs. in the quarter.
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Old Jul 5, 2002 | 01:15 PM
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Default Re: Gear and TC questions (Mike Campbell)

With a MN6 the main reason for reprograming is to correct the speedo.
Sigh... Not correct. No programming is necessary to "correct the speedo" in either stick or auto. Vehicle speed computations require axle rotation rate in the form of the 40 PPR signal supplied by the VSS which is completely independent of the actual gear ratio (they all implement signal generation the same way.)
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Old Jul 5, 2002 | 02:29 PM
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Default Re: Gear and TC questions (ToplessTexan)

Well, I stand corrected! I sent my powerloader back to reprogram. Anyway, only cost me the UPS fee. Maybe they didn't do a thing?!? :rolleyes: It was worth the comfort level though.... Car runs good though. :D
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Old Jul 5, 2002 | 02:41 PM
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Default Re: Gear and TC questions (Mike Campbell)

Well, I stand corrected! I sent my powerloader back to reprogram. Anyway, only cost me the UPS fee. Maybe they didn't do a thing?!? :rolleyes: It was worth the comfort level though.... Car runs good though. :D
The good news is you got it back. :jester
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Old Jul 5, 2002 | 03:54 PM
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Default Re: Gear and TC questions (ToplessTexan)

Sigh... Not correct. No programming is necessary to "correct the speedo" in either stick or auto.
Just when you think this is common knowledge by now, you understand why rehashing old topics is a good thing. The reluctor pickup wheel (where the VSS gets its speedometer pulses) has the same amount of notches, no matter if you have the 2.73, 3.15, 3,42, 3.72, 3.90.... carrier on the C5.


[Modified by Mike Mercury, 2:57 PM 7/5/2002]
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Old Jul 5, 2002 | 04:24 PM
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Default Re: Gear and TC questions (Mike Mercury)

Just lookin' out for all my Pewter brothers out there. :seeya

I try not to get too worked up as you can't correct every little thing. There is however a difference between misinformation and disinformation. What I'm really on a tear about is the bonehead advice Vettepartz is getting (from so called professionals even) to solve his programming problem with a TransGo kit and new valve body. I don't think that's being offered with the same helpfulness that that I sensed in MC's post above.
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Old Jul 5, 2002 | 04:38 PM
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Default Re: Gear and TC questions (kwik8racr)

I have a 98 C5 auto tranny with 2:73 gears. Im in the same process of trying to find a used 3500 Superyank Converter and used 3:42 Gears
(in complete housing). When I find them I will be switching also. This info is very informative thanks guys! :seeya
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Old Jul 5, 2002 | 04:43 PM
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Default Re: Gear and TC questions (ToplessTexan)

Hey Topless Texan mine is a Pewter also!!! :seeya
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Old Jul 5, 2002 | 05:13 PM
  #15  
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Default Re: Gear and TC questions (harleyvette)

:D
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Old Jul 6, 2002 | 03:43 PM
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Default Re: Gear and TC questions (harleyvette)

Hey Harleyvette.....

I think Nitrovette has a used 3500tc up for ale in the used parts section.
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Old Jul 6, 2002 | 04:36 PM
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Default Re: Gear and TC questions (BlackSun!)

Hi, Nitrovette is the one I thought I had made a deal with! So unfortunetly Im still looking for a 3500 converter. I pick up my 3:42 gears on Monday.
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