[Wac]

My 700r4 is behind a SBC in a jeep wrangler. It needed to be rebuilt after I took it swimming... (don't ask...). I tow a 4000lb boat/trailer with it and the rig itself weights about 4000lbs with ford rear end, 33" tires, full size spare, back seat for kids, and the list goes on.

The shop i took it to suggested a "heavy duty" rebuild which involves a bunch of new/upgraded parts: heavy duty 3-4 clutch packs, 5 pin front planetary, front plnetary hub, 5 pinion rear planetary and some changes to the pressure the pump puts out to keep line pressure a little higher.

They also suggested upgrading to a corvette servo to firm up the 1-2 shift... about $50.

To all those trans guys out there... 2 questions (be honest please!!)

1. is this worth the extra $550 the shop wants for the "HD Rebuild parts" or should I stick with the standard rebuild for my application.
2. is the corvette servo worth the cost? Will I notice a difference in a jeep towing a boat or is this just going to give me whiplash when I get on the throttle?

[SSedan64]

Originally Posted by Wac

My 700r4 is behind a SBC in a jeep wrangler. It needed to be rebuilt after I took it swimming... (don't ask...). I tow a 4000lb boat/trailer with it and the rig itself weights about 4000lbs with ford rear end, 33" tires, full size spare, back seat for kids, and the list goes on.

The shop i took it to suggested a "heavy duty" rebuild which involves a bunch of new/upgraded parts: heavy duty 3-4 clutch packs, 5 pin front planetary, front plnetary hub, 5 pinion rear planetary and some changes to the pressure the pump puts out to keep line pressure a little higher.

They also suggested upgrading to a corvette servo to firm up the 1-2 shift... about $50.

To all those trans guys out there... 2 questions (be honest please!!)

1. is this worth the extra $550 the shop wants for the "HD Rebuild parts" or should I stick with the standard rebuild for my application.
2. is the corvette servo worth the cost? Will I notice a difference in a jeep towing a boat or is this just going to give me whiplash when I get on the throttle?

I'm not a Pro builder but, this doesn't sound like a Trans that is gonna be babied. Those 4L65E 5 Pinion planetaries aren't cheap,$350-$450. Corvette Servo isn't worth $50, maybe $10. It wont snap your neck, just firm up shift.
Most don't like the Alto 3-4 Power Pack = Thin steels. Z-Pack may be better choice. All in all, I'd upgrade as much as I could afford. Add Beast Sun Shell to the list $45.

[Wac]

Originally Posted by SSedan64

I'm not a Pro builder but, this doesn't sound like a Trans that is gonna be babied. Those 4L65E 5 Pinion planetaries aren't cheap,$350-$450. Corvette Servo isn't worth $50, maybe $10. It wont snap your neck, just firm up shift.
Most don't like the Alto 3-4 Power Pack = Thin steels. Z-Pack may be better choice. All in all, I'd upgrade as much as I could afford. Add Beast Sun Shell to the list $45.

Thanks for the advice

The BEAST is going in... now (it wasn't on the original parts list but several places I read, including your post, suggested it as simple yet strong upgrade)

Z-pack is already on the parts list...

Anything else? I haven't quite drained all the cash out of the Kids college funds yet....

[richard stewart 3rd]

Hi,
What are you doing about the TC?

http://racetransmissions.com/store/i...cPath/21_32_52

http://racetransmissions.com/store/p...roducts_id/418

http://racetransmissions.com/store/p...roducts_id/419

http://racetransmissions.com/store/p...roducts_id/692

[n_keiser_rat]

as heavy as that trailer is you should run an extra or bigger tranny cooler, the 700r4 are good trans just make sure you keep it cool, they are notorious for over heating while under a heavy load. even if you dont pull the trailer all the time its a good idea and wont do anything but help you in the long run

[SSedan64]

As Keiser Rat suggested run a (Large) external cooler and keep the cooler in radiator.
Also read this by Crosley on modifying the Lube to planetaries>> Increase lube oil to 700r4/4l60 rear planets ? the 5-Pinion planets have upgrades for lube, oil circuit that sends fluid to them can be modded.

[Wac]

Originally Posted by SSedan64

As Keiser Rat suggested run a (Large) external cooler and keep the cooler in radiator.
.

I used to have this one:
http://www.bmracing.com/SPECIALS/Pol...11x4-1-2x1-1-2

but just ordered this one!
http://www.bmracing.com/SPECIALS/Pol...BTU-11x8x1-1-2

should be good right?? almost 3 times the BTU capacity... If I go much bigger my radiator might get jealous....

[BigDawgsEatFirst]

Everyone is on track with answered given
Heat is Bad,Swimming is Expensive too
What type of Warranty is on the table???

[Wac]

Originally Posted by BigDawgsEatFirst

What type of Warranty is on the table???

Minimal... this shop builds for large trucks and other off road rigs... they don't do much for warranty on these because of the nature of the use of the vehicle. (Jeep: 4 wheeling in muddy Florida...original cause for the re-build) Other shops had similar policies. They stand behind the rebuild... but won't stand behind a trans that goes swimming routinely.

With that said... a good friend of my handles their business/shop insurance so the treatment has already been stellar. I'm not worried about getting the cold shoulder if I have a concern in the near future.

[BigDawgsEatFirst]

Have a Good Time with it
Youll like the Corvette Servo
Not Harsh At All

[Wac]

Originally Posted by BigDawgsEatFirst

Have a Good Time with it
Youll like the Corvette Servo
Not Harsh At All

Like it... I LOVE IT!! The trans after the rebuild is better than i thought it would be! Worth the extra bucks for the good parts... and the good shop.