Dedenbear Case

Roberts Motorsports · 03-18-2014, 05:14 PM

With the good quality delay boxes of today like Dedenbear, K&R, Biondo, if the box is at 000, the trans-brake should release exactly the same as if you had it wired direct.
The older delay boxes of 20-25 years ago used to have about a .005 to .01 difference, but that is very old technology and I would hope that all of those have gone to the scrap pile long ago.

Squirrell · 03-22-2014, 08:56 PM

Hi Guys, I have had a chance to catch up with the transmission builder, and the reverse pack had 5 clutches , he took one out because he likes low gear to be better than reverse. If something starts to slip , the car will go forward and not backwards. He replaced the clutch disc with an extra steel disc and we have a total of .055" clearance. Is this were we should be ?. Thanks Patrick.

Roberts Motorsports · 03-23-2014, 12:04 PM

Your clutch pack clearance at .055" is fine. I disagree with going from a 5 friction pack to a 4 friction pack however. If you are making less than 600 HP the 4 friction pack will probably be OK, BUT if you are making more than that you are asking for trouble. Your reverse pack longevity will suffer and you open up the possibility of creeping when you go to W.O.T. on the trans-brake. The thinking of making low stronger than reverse is flawed. The object of a trans-brake is to HOLD the car stationary and not move. To do that, both low & reverse must be able to hold equal amounts of torque and not slip.

03-18-2014, 05:14 PM	#1
Roberts Motorsports Junior Member Join Date: Aug 2011 Location: Davidson, NC Posts: 25 Likes: 1 Liked 1 Time in 1 Post	Re: Dedenbear Case With the good quality delay boxes of today like Dedenbear, K&R, Biondo, if the box is at 000, the trans-brake should release exactly the same as if you had it wired direct. The older delay boxes of 20-25 years ago used to have about a .005 to .01 difference, but that is very old technology and I would hope that all of those have gone to the scrap pile long ago.

03-22-2014, 08:56 PM	#2
Squirrell Junior Member Join Date: Apr 2013 Posts: 33 Likes: 0 Liked 0 Times in 0 Posts	Re: Dedenbear Case Hi Guys, I have had a chance to catch up with the transmission builder, and the reverse pack had 5 clutches , he took one out because he likes low gear to be better than reverse. If something starts to slip , the car will go forward and not backwards. He replaced the clutch disc with an extra steel disc and we have a total of .055" clearance. Is this were we should be ?. Thanks Patrick.

03-23-2014, 12:04 PM	#3
Roberts Motorsports Junior Member Join Date: Aug 2011 Location: Davidson, NC Posts: 25 Likes: 1 Liked 1 Time in 1 Post	Re: Dedenbear Case Your clutch pack clearance at .055" is fine. I disagree with going from a 5 friction pack to a 4 friction pack however. If you are making less than 600 HP the 4 friction pack will probably be OK, BUT if you are making more than that you are asking for trouble. Your reverse pack longevity will suffer and you open up the possibility of creeping when you go to W.O.T. on the trans-brake. The thinking of making low stronger than reverse is flawed. The object of a trans-brake is to HOLD the car stationary and not move. To do that, both low & reverse must be able to hold equal amounts of torque and not slip.

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