Rear gears

[tonybrooklyn]

Okay here's the deal my buddy wants 373 gears like i put in my mark Viii. But unlike me he has a 3.07 ratio not a 3.27 as i did i in fact i needed no tune to do it. My question is this do you think he can go to 373's with out a tune? I say yes i doubt Lincoln used a different tune for a 307 vs a 327 thoughts? As always thanks in advance for your help in this matter!:thumbsup:

 

[Jamesvinar]

You both would need a tune. I drove my crown vic for a few months after getting gears put in thinking it was fine but once i got one in it was a big difference.

You would need something to correct the speedo anyway

 

[driller]

... i doubt Lincoln used a different tune for a 307 vs a 327 thoughts?

Actually, yes it is different. If nothing else the "N/V" value will be different which is used for many parameters in the tune such as shift points, torque converter lockup settings, etc...

General rule of thumb though says it is acceptable up to two steps in the gear change, 3.73s would be 3 steps, so...

You would need something to correct the speedo anyway

Not on the Gen2.

I would say to "just do it", assuming it is a Gen2 and no speedo correction is needed. Worst case would be "short shifts" and out of ordinary torque converter lockup. But realize a tune would be beneficial. :wink:

 

[beerdog]

We went from a 3:08 to 3:73. drove it all the way back from Jeremi's to chicago. You can drive it but you will want a tune. It will shift at odd places. Plus your engine will rev higher at all speeds. On the highway you will be running 2500-3000 rpm in overdrive at 70.

 

[Jamesvinar]

I know these are different cars but they are pretty similar, on my crown vic the speedo was off by about 4mph until i got the tune.

Might lose first gear without the tune if its from a 3.08

 

[mag]

I say leave it alone if your not a racer it's a waste of time and money.

 

[tonybrooklyn]

I say leave it alone if your not a racer it's a waste of time and money.

He drove mine with 3.73's and he wants it i tried to tell him not needed.

We went from a 3:08 to 3:73. drove it all the way back from Jeremi's to chicago. You can drive it but you will want a tune. It will shift at odd places. Plus your engine will rev higher at all speeds. On the highway you will be running 2500-3000 rpm in overdrive at 70.

I appreciate your input as i could not honestly answer him i started with 3.27's.

Actually, yes it is different. If nothing else the "N/V" value will be different which is used for many parameters in the tune such as shift points, torque converter lockup settings, etc...

General rule of thumb though says it is acceptable up to two steps in the gear change, 3.73s would be 3 steps, so...
Thanks Driller you are always the voice of reason.



Not on the Gen2.

I would say to "just do it", assuming it is a Gen2 and no speedo correction is needed. Worst case would be "short shifts" and out of ordinary torque converter lockup. But realize a tune would be beneficial. :wink:

Yes it is a gen 2, i think i am going to suggest 3.55's to him although many say a waste of time and money.
All he really wants is some more punch off the line. My fault really we where fooling around and i toasted him at a light.
I tried to tell him its not just the gears i did the trans , converter and injectors but his mind is set on it.
Do you think 3.55's will pacify him?

 

[driller]

Do you think 3.55's will pacify him?

No. :laugh:

 

[germansheperd]

I put 3.73s in mine had a tune done and put in a 21 tooth gear in the tranny. My speedo is off exactly 1 mph according to all radars and GPS.
3.73s are the very minimum you want. If I had to do over I'd go 4.1s.

 

[beerdog]

Our car was Gen 2. If you want more punch of the line from a stock car 4:10's is the way to go. We have a 3:37 and 4:10 car and it is a big difference. No difference in cost between the 2 options. He will also want a different drive shaft with either gear choice.

 

[tonybrooklyn]

Alright you guys twisted my arm i am gonna give my car a tune. I figure i can use it when i do my buddies gears as he refuse's to let go Lol!

Hows this for a tuner any good?
http://www.ebay.com/itm/SCT-Perform...ash=item5b25f648f0:g:nCMAAOSwLnBXWb3Z&vxp=mtr

 

[tonybrooklyn]

No. :laugh:

I didn't think so:wink:

 

[driller]

Hows this for a tuner any good?
http://www.ebay.com/itm/SCT-Perform...ash=item5b25f648f0:g:nCMAAOSwLnBXWb3Z&vxp=mtr

The hardware is cheap. It's the proper sequence of the 1's and 0's that matters.

I've known a couple different tuners who did not care for the iTSX for whatever reason. The popular SCT handheld programmer now is the X4 and sells for about the same.

The pre-programmed SCT tunes will pale in comparison to a dyno tune or a custom 'mail order' tune for your application and modifications.

 

[Jamesvinar]

I would go for an X3, It's cheaper and will do the same exact job. I played with the Tsx a while back and had connectivity issues with it being bluetooth, X3 is a wire so it's stable.

Couple things to remember
1. Make sure the device is unlocked before purchasing it, the tuner can only be used on one car at a time meaning if you use it to tune your car it cannot be used on any other car until yours is reverted back to stock or sent to the manufacturer for unlocking which is a pretty good price
2. We don't have stock tunes so you would have to get a mail order or dyno tune, Marty from Mo's speed shop is great

 

[beerdog]

I would only go 3:55 if you have a high HP car or some mods and a manual trans.

 

[tonybrooklyn]

This guy is going to take my 3.73's i.m going to go 4.10's. No brainier really i am going for the tune might as well.
Was thinking of going with a 3600 R.P.M Stall converter made by Road runner converters in Florida any thoughts?

 

[driller]

Was thinking of going with a 3600 R.P.M Stall converter made by Road runner converters in Florida any thoughts?

These cars really do well with a good stall converter and gears. In my experience, a 3,600 stall converter would be the minimum I would recommend for a Mark VIII. I have never heard of Road Runner converters though, but I can recommend Circle D and Precision Industries.

 

[germansheperd]

This guy is going to take my 3.73's i.m going to go 4.10's. No brainier really i am going for the tune might as well.
Was thinking of going with a 3600 R.P.M Stall converter made by Road runner converters in Florida any thoughts?

3-3600 stall. Ive had great experiences with Circle D and TCI.