In Praise of the ZF 8 Speed

[Orange01z28]

As I'm going down the freeway at 80 miles an hour with 5.13 gears and 37's I cannot help but praise the ZF eight speed. It performs great on and off road and is what makes this built Jeep still be able to be a DD

Sponsored

 

[WILDHOBO]

As I'm going down the freeway at 80 miles an hour with 5.13 gears and 37's I cannot help but praise the ZF eight speed. It performs great on and off road and is what makes this built Jeep still be able to be a DD

I couldn’t agree more. I’m running the same setup. And I can tow our small trailer at 77 comfortably.

 

[gunsnrods]

When I bought my Gladiator my plan was another shifter after two manual Wranglers. Ended up driver an auto, bought an auto.
Living in Idaho we have big hills and mountains and gearing down to ascend or descend is an everyday event. The auto is a good choice, no regrets.

 

[dcmdon]

As I'm going down the freeway at 80 miles an hour with 5.13 gears and 37's I cannot help but praise the ZF eight speed. It performs great on and off road and is what makes this built Jeep still be able to be a DD

Just out of curiosity, what are you turning for RPM at 70 mph in 8th?

Or if you have it at a different speed, I can figure it out. I'm curious what the combo of gearing and 37 ends up at.

Thank you.

 

[Orange01z28]

Just out of curiosity, what are you turning for RPM at 70 mph in 8th?

Or if you have it at a different speed, I can figure it out. I'm curious what the combo of gearing and 37 ends up at.

Thank you.

I’ll check when I leave today. At 70 it’s 2000ish or lower from memory

 

[Dim]

nobody never had the feeling sometimes the gearbox acting like a dumb? like staying on the same gear o high rev instead of shifting up? an update must be done? or the rubicon stock gear ratio isnt good with 35's
dont know...

 

[just_another_guy]

nobody never had the feeling sometimes the gearbox acting like a dumb? like staying on the same gear o high rev instead of shifting up? an update must be done? or the rubicon stock gear ratio isnt good with 35's
dont know...

Mine hangs onto gears for an uncomfortably long time when I'm towing, it doesn't seem to like the additional load. If it really bothers me I just manually shift it. I wish they would tweak the shift logic a tad for those conditions, but overall I'm very happy with the 8 spd

 

[Dim]

Mine hangs onto gears for an uncomfortably long time when I'm towing, it doesn't seem to like the additional load. If it really bothers me I just manually shift it. I wish they would tweak the shift logic a tad for those conditions, but overall I'm very happy with the 8 spd

yeah a very nice gearbox for sure . those long time are the reason why i installed a 392 steering wheel with paddle shifters. works great

 

[just_another_guy]

yeah a very nice gearbox for sure . those long time are the reason why i installed a 392 steering wheel with paddle shifters. works great
[/

I was wondering about the paddle shifters for that scenario since you normally have to move the shifter over from the D position to manually shift. Do you still have to do that for the paddle shifters? Seems like the truck would fight your inputs if you didn't.

 

[Dim]

I was wondering about the paddle shifters for that scenario since you normally have to move the shifter over from the D position to manually shift. Do you still have to do that for the paddle shifters? Seems like the truck would fight your inputs if you didn't.

in fact you can use it even in Position D. you just have to double click on the right or left paddle to engage the manual mode. ony thing in this way you dont see whih gear is engaged next to the D on the dashboard. and then long push on the + paddle to go back in fully auto.

 

[Escape.idiocracy]

Y’all should edit the title to 850RE. 8HP75- diesel.

 

[WILDHOBO]

nobody never had the feeling sometimes the gearbox acting like a dumb? like staying on the same gear o high rev instead of shifting up? an update must be done? or the rubicon stock gear ratio isnt good with 35's
dont know...

These are high rpm engines. They’re designed to run fast. Forcing them to run at lower rpm’s could potentially shorten their life. Just let the tranny do it’s thing.

 

[Dim]

These are high rom engines. They’re designed to run fast. Forcing them to run at lower rpm’s could potentially shorten their life. Just let the tranny do it’s thing.

ah ... thats an helpfull and bad news answer.... i'm an european guy ... raised with fully torqued low rpm turbo diesel engine... and i really dont like when it's shift up than 2000 -2500 rpm.
now i have the confirm that i need to adapt my driving style and learn about how to drive with naturally aspirated gas engie. thanks for the answer i appreciate

 

[WILDHOBO]

ah ... thats an helpfull and bad news answer.... i'm an european guy ... raised with fully torqued low rpm turbo diesel engine... and i really dont like when it's shift up than 2000 -2500 rpm.
now i have the confirm that i need to adapt my driving style and learn about how to drive with naturally aspirated gas engie. thanks for the answer i appreciate

Not all naturally aspirated gas engines like high rpm’s, but this one does.

 

[Dim]

Not all naturally aspirated gas engines like high rpm’s, but this one does.

jeez my engine must probably hate me ;-) i think on 25000 miles he saw 5 times up to 4000 rpm ;-)
most of the time im driving it like my old GTD with DSG gearbox

Sponsored