Town Car/J-MOD

[Timw286]

I have a 2000 Town Car with 120,xxx, which I use as my DD. I was wondering if a J-MOD would be beneficial as to preserving the transmission. (I read on some crownvic forum that it can be done to panthers 1998 and up). I don't abuse the car, nor do I drive it in any other way than a Town Car was meant to be driven, I'm just looking for tranny longevity.

[RacerX]

You can do it to any 4R70W. Did it on my 95 Thunderchicken 7+ years ago...

[RF Overlord]

^^^what RacerX said^^^

...although I question the necessity. There are thousands of Town Cars used as limos for hundreds of thousand of miles with little or no transmission maintenance. I would think that just changing the fluid periodically would put you ahead of the curve...

[ctrlraven]

I did the J-Mod on my MM around 155k miles on it I think.

[ChiTownMaraud3r]

The killer is also heat, you can also add a transmission oil cooler.

[RacerX]

The killer is also heat, you can also add a transmission oil cooler.
Awesome point! I actually had a tranny cooler on the Thunderchicken, totally forgot about that! :beer:

[JoeBoomz]

I'd think the only issue you'd really have is with the OD band wearing out from hard downshifts on the highway. Shift kit won't help with that.

I would leave the Town Car unmodified.

[Timw286]

Yeah good points there, I'm just driving about 50 miles round trip on straight back roads, and if brutally abused NYC taxis can reach 300k + unmodified I guess I should be alright.

[ctrlraven]

Just keep the maintenance up on it. If you plan on keeping it a while, it might be a good benefit to get a trans pan with a drain plug in it, every 3rd/4th oil change change out 4-5 qts of fluid and go on your merry way. If the transmission has never been serviced def get the filter changed soon at least.

[jstevens]

What are the downsides of the j-mod?

[guspech750]

What are the downsides of the j-mod?

There are no such things as downsides of the J-mod. Nothing but sweetness!!


---
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Eaton Swap = Wreeeeeeeeeedom!!

[ctrlraven]

None really besides a little less money in your wallet I would guess. People who have it done and then jack up their shift pressure stand a better chance of something breaking.

DOOM has his done and I believe his shift pressure in his tune is set to 0% and it's perfect, at least I think and I'm sure he does.

A friend of mine had his done on his Mark 8 and had it up so high (built trans though) barely even half throttle and it was barking the tires enough a cop actually stopped him for squealing wheels. lol

[Timw286]

I need to look around for a local performance shop that is familiar with that MOD to do it for me, I've never messed around with a tranny before

[Bradley G]

Just print off the instructions and take it to a trusted wrench.

I need to look around for a local performance shop that is familiar with that MOD to do it for me, I've never messed around with a tranny before

[jstevens]

Well, its hard to decide. I don't want my wifes neck to break. She won't drive it now as it is.

But, if it prolongs the trans life then I might be game.

[kmastl]

I went with keeping the 1-2 spring and no 2-3 spring. Stock pressures I really like how it shifts.

[ctrlraven]

Well, its hard to decide. I don't want my wifes neck to break. She won't drive it now as it is.

But, if it prolongs the trans life then I might be game.
See below.


I went with keeping the 1-2 spring and no 2-3 spring. Stock pressures I really like how it shifts.
For a stock DD cruising car this is what I would do.

[ChiTownMaraud3r]

I've never messed around with a tranny before

Well I'd hope you haven't. ;)