building transmission questions

[whiteram1500]

what are my options are there clutch kits to add more clutch's?
Is there any shift kits available for the 6 speeds?
If you know anything let me thanks

 

[Pull Ya]

Hemiup can probably give you the best info on rebuilding your trans and shift kits. Matt at Moe's has lots of good information on the subject also. I'm sure they will chime in when they see your post.
Jay

 

[Hemi450hp]

Best transmission mod you can buy is actually free. If you teach yourself not to do any WOT downshifts on the highway and keep it out of WOT in 4th gear, then you will be fine. My regular cab that runs 12.0's in the 1/4 is still on a stock transmission. Only changes to the transmission are a higher stall tq converter and a valvebody from Hemidup that only affects the 1-2 shift.

There are companies out there that offer built transmissions, but if you don't avoid the 2 scenarios I mentioned, then even the built transmissions are going to fail.

 

[whiteram1500]

I was asking because I was wot the other night from a stop and it shifted pretty hard into third and I was at about 65. Now every once in awhile I get a rough downshift, thanks for all your input

 

[RJP]

Really dumb question... What is "WOT"?

 

[Pull Ya]

Wide Open Throttle=WOT
Jay

 

[RLJ10X]

Hey Matt, I get the WOT downshift.

But if I'm "locked into", so to speak, with the Slap Stick, in 4th, what's going on that I can't go WOT then?

 

[Hemi450hp]

It doesn't matter what gear you have selected on the dash, when you go WOT, it is going to downshift into the appropriate gear. You shouldn't be in 4th gear at WOT until about 130mph, so you would have to be going 130+ mph to keep it from downshifting when you go WOT.

Even then, 4th gear is the weakest gear in the transmission, so you do not want to be in 4th at WOT anyways.

 

[charonblk07]

The manual shift selection only limits the maximum gear it will shift into, it's not a true gear selector.

Matt's given you what you really need to know to keep a trans alive. There will come a time when that won't be enough and I'd recommend talking with hemidup or Mike at L&M Customs, they're putting together trans that are hanging in there with big hp builds.


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[R/T_Fire]

The manual shift selection only limits the maximum gear it will shift into, it's not a true gear selector.

Matt's given you what you really need to know to keep a trans alive. There will come a time when that won't be enough and I'd recommend talking with hemidup or Mike at L&M Customs, they're putting together trans that are hanging in there with big hp builds.


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I wonder if someone can reprogram that to use the selector as an actual gear selector not just the gear limiter.

 

[RLJ10X]

Yeah, you can't get locked into any gear. Poor choice of words on my part. You can go down, you just can't go up.



So you're saying: if I am slap sticked in 4 th gear; Merging onto westbound I-64 at the Indiana 86, which is a mile long uphill, running 75 mph, assuming it didn't downshift, I shouldn't floor it because the clutches in 4th are so weak, that even tho they are fully engaged, they are too weak to hold? That's disappointing.

 

[charonblk07]

You don't want to be in 5th and downshift into or through 4th but you are alright if you're in 4th and it downshifts into 3rd or 2nd. The 2nd prime clutch pack (4th gear) only holds about 75% of the line pressure compared to any of the other gears so shifting into 4th at WOT puts the most torque on the system and you have the highest chance of the clutch packs slipping.

What you want to do is if you're cruising or you need to floor it just manually downshift it to 3rd before flooring the pedal. Once you do it a few times you get used to doing it and it becomes habit.

 

[RLJ10X]

Isn't 2nd Prime, actually 3rd?

So, how do we get more line pressure to 4th gear, to rectify this situation? And why is it set up that way in the first place?

Char, im going to try out your, and Matt's advice today, merging onto I-64. Then, later, when I'm doing 50ish, I'll put in 3rd and romp on it. We'll see how that goes. I like using the Slap Stick reguardless.

 

[popcenator]

It gets to be second nature once you're use to it, and its actually kinda fun.

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[hemidup]

what are my options are there clutch kits to add more clutch's?
Is there any shift kits available for the 6 speeds?
If you know anything let me thanks

Alto makes their Red Eagle clutch and steel packs that add an additional clutch in overdrive. Also their 2c and 4c Powerpacks add an additional clutch and steel in both 4th and 2nd gear.

And as of now there are no aftermarket shift kits available, such as Transgo, for the 2010 and newer trucks.

The Sonnax line pressure booster will increase the line pressure by 10-15 psi during part throttle driving conditions, which is very helpful in towing applications, but does not increase line pressure at WOT.

Hope this helps

 

[hemidup]

You don't want to be in 5th and downshift into or through 4th but you are alright if you're in 4th and it downshifts into 3rd or 2nd. The 2nd prime clutch pack (4th gear) only holds about 75% of the line pressure compared to any of the other gears so shifting into 4th at WOT puts the most torque on the system and you have the highest chance of the clutch packs slipping.

At WOT all your forward gears see 165 psi of line pressure. What I think you where trying to state is that in the overdrive gears the clutch packs have to hold 100% or more of the torque input whereas in 3rd or 4th, depending on year model, but your 1:1 gear ratio only has to hold 70% of the torque input.

 

[charonblk07]

At WOT all your forward gears see 165 psi of line pressure. What I think you where trying to state is that in the overdrive gears the clutch packs have to hold 100% or more of the torque input whereas in 3rd or 4th, depending on year model, but your 1:1 gear ratio only has to hold 70% of the torque input.

Yeah, that's a better explanation and makes more sense, it's not the application pressure that's the issue it's the increase in friction resistance that's problem. Thanks for the clarification.

 

[whiteram1500]

does the 545RFE alto kit work on the 65RFE? I know they are the same but with second gear prime, im just checking I couldn't find one specific to a 65RFE if you have a link let me know

 

[hemidup]

does the 545RFE alto kit work on the 65RFE? I know they are the same but with second gear prime, im just checking I couldn't find one specific to a 65RFE if you have a link let me know

45, 545 and 65 all use the same clutch packs. Just don't use the 45/545 Transgo shift kit in the 65.

 

[matty169]

45, 545 and 65 all use the same clutch packs. Just don't use the 45/545 Transgo shift kit in the 65.

Why not? I talked to Trans Go engineering about this and they felt it would work fine and saw no reason not to try it. Thanks