Re: [AMC-list] Energizer Cam

[Wrambler <wrambler242@xxxxxxxxxxx>]

To all, 
Remember when doing an overdrive calculation the front gearset comes into play.
Power goes from input>cluster>O.D.drive gear> O.D.driven gear on the output.
A 2.95:1 first gear trans will have a different final O.D. than say a 3.35:1 trans, all things else being equal. 
(O.D. gearset) 

The next fun fact is you can't swap O.D. sets between Ford and Chevy! Not sure which club the AMC trans falls into!

as for using the 3.35:1 trans with a 3.73:1 rear axle, depending on tire size and
how freely your engine breathes, how you drive etc, while the math looks ugly, the actual
driving feel of the car may be fine.
  I have the 4.09:1 AMC T5 with 3.31:1 rear axle and 255/60/15's while it is not "ideal", falls 
way outside of what is considered "norm" for first gear total ratio, it is 100% driveable and
even quite fun at times.

  years ago, when I was misguided and had a Mustang Gt I read a lot of Ford mags.
At that time they mentioned that 3:55 was the "best" overall rear axle against the 3.3:1 trans and
3:73 was max you want on any street car with that trans.

  Just my $.02 ad that to $5 and you might get a cup of coffee at Starbucks.
YMMV, 

Mark Price
Morgantown, WV 26508
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
"I realize that death is inevitable.
I just don't want to be around when it happens!"

----- "Jim Blair" <carnuck@xxxxxxxxxxx> wrote:

> From: "Jim Blair" <carnuck@xxxxxxxxxxx>
> To: amc-list@xxxxxxxxxxxx
> Sent: Tuesday, March 23, 2010 12:13:00 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [AMC-list] Energizer Cam
>
> What ratio 5th would my '82 J10 T5 have? .75?
> 
> Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10
> 
> From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)
> To: amc-list@xxxxxxxxxxxx
> Subject: Re: [AMC-list] Energizer Cam
> Message-ID: <201003230126.o2N1Q0n29374@xxxxxxxxxxxxxxxxx>
>  
> " From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>
> " 
> " 3.73s would make first gear completely worthless in the T5, as you
> said
> " about the .8 overdrive, I've got the wrong T5 for that...first in
> the T5 is
> " 3.35.
>  
> my mistake.  i thought when you said 0.63 5th you had the 2.95 1st.
>  
> mid '80s nissan turbo z cars had a 0.78 5th with 3.35 1st, and
> there's
> also a warner oem 0.83 5th, used on the #1352-254 wc t5.
>  
> if i had the tranny apart to swap 5ths, i'd also put the countershaft
> stabilizer in from 5speeds.com.
>  
> " I think it would be like what we used to call a super granny low
> gear
> " in farm trucks, just to get it rolling, then shift into second.
>  
> that's low enough but not nearly a proper granny.  it's valuable
> enough for saving clutch wear-and-tear at stops.  many cars today
> have
> very low 1sts; mercedes widely used their nsg370 in cars, even 2dr
> convertibles, and it has a 4.46 1st.
>  
> all large and many medium duty trucks have granny gears, because of
> their low power-to-weight ratio.  they really are useless at anything
> above a dead stop, but the step to 2nd is usually also big and
> potentially difficult on a grade.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
>  		 	   		  
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