06 5.7 R/T TCM in a 3.5L Nag 1?

**Charger4Life** · 11-26-2009, 11:06 AM

Can someone tell me if this will work properly. My buddy is having trouble getting good shifts out of his 3.5L and I was gonna let him try an extra TCM I have for my R/T.

Thanks

**InferAl** · 11-26-2009, 11:10 AM

Originally Posted by Charger4Life

Can someone tell me if this will work properly. My buddy is having trouble getting good shifts out of his 3.5L and I was gonna let him try an extra TCM I have for my R/T.

Thanks

Does he have a 4 or 5 speed is it a Nag1

**Charger4Life** · 11-26-2009, 11:13 AM

Originally Posted by InferAl

Does he have a 4 or 5 speed is it a Nag1

He has a 5 speed Nag 1. cause he said it shows 5 in autostick now.

**Fargo59** · 11-26-2009, 11:14 AM

only issue would be gear ratio. otherwise i can see it working. he'd need higher shift points than stock RT's though.

3.5's use the same TCM as the 5.7 and 6.1, it's all programming differences.

**InferAl** · 11-26-2009, 11:16 AM

Originally Posted by Charger4Life

He has a 5 speed Nag 1. cause he said it shows 5 in autostick now.

He could try it, it may be the same TCM being it is a Nag1........what rpm does it shift at now

It may be simply cause it is a 3.5 that it doesn't shift as good

**InferAl** · 11-26-2009, 11:18 AM

Originally Posted by fargo59

only issue would be gear ratio. otherwise i can see it working. he'd need higher shift points than stock RT's though.

3.5's use the same TCM as the 5.7 and 6.1, it's all programming differences.

What gear would they put in a 3.5 with a Nag1, I know the 4 speed 3.5 is about a 3.56 or 3.6X can't remember

**Charger4Life** · 11-26-2009, 11:20 AM

Originally Posted by InferAl

He could try it, it may be the same TCM being it is a Nag1........what rpm does it shift at now

It may be simply cause it is a 3.5 that it doesn't shift as good

I'll have to find out what his shift point is. He updated his CROM and now it isn't shifting as good. He says it feels like the convertor unlock for a split sec. then goes to next gear.

**InferAl** · 11-26-2009, 11:25 AM

Originally Posted by Charger4Life

I'll have to find out what his shift point is. He updated his CROM and now it isn't shifting as good. He says it feels like the convertor unlock for a split sec. then goes to next gear.

I think ther new croms get worse as they go, I keep r12

**65standard** · 11-26-2009, 11:50 AM

Originally Posted by inferal

what gear would they put in a 3.5 with a nag1, i know the 4 speed 3.5 is about a 3.56 or 3.6x can't remember

2.87

**MidnightSXT** · 11-26-2009, 08:07 PM

Originally Posted by 65standard

2.87

Yes,unfortunately this is true. Mine is a 2.87

**ToddStone** · 11-26-2009, 11:27 PM

Same, I think that's pretty much all the way around. I think if you get the Predator it can reprogram it for ya.

**392Stu** · 12-10-2009, 10:05 PM

After doing that 4.0 L stroker on the 3.5 All I could think was the 3.73 getrag differential swap would be too cool. That combined with a TCM that had 7K plus RPM upshifts. The little 3.5 likes to run upstairs when modded.

**todd0218** · 12-22-2009, 03:00 AM

Originally Posted by 392Stu

After doing that 4.0 L stroker on the 3.5 All I could think was the 3.73 getrag differential swap would be too cool. That combined with a TCM that had 7K plus RPM upshifts. The little 3.5 likes to run upstairs when modded.

man i cant wait to see you guys do more modding on the 3.5l, i have been watching for more advancements and breakthroughs daily. LOL. i know the 3.5l isnt a powerhouse, maybe never will be but you guys are one of few that took initiative to fulfill the needs of us 3.5l owners.