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C-13 Jake Brake Question

Yahoo Message Number: 16914
Here is how our jake brake is working. In the low and high positions the transmission automatically downshifts to 4th gear and applies the jake brake. In middle position, no downshift occurs although it seems to apply the exhaust brake. Once the brake is on, there seems to be no difference in braking between any of the three positions. I suspect this is not right but I'm looking for comments. Also, is it normal for the jake to not function if the cruise control is on? If so, why didn't CC wire the jake so that it cancels the cruise instead of the cruise cancelling the jake. If it's not normal, I'll put it on my fix list. Thanks.
Bob

'05 Intrigue LE #11872

Re: C-13 Jake Brake Question

Reply #1 –
Yahoo Message Number: 16929
Bob,

If that is the way your Jake brake is working, it is not working right. The only thing the three-position switch is doing is select whether the brake is activated on two, four or six cylinders, with increasing brake force with increase of number of cylinders used. Once you turn the Jake on, the tranny should downshift as far as the RPMs allow. With the cruise control on, the transmission will still downshift, but the Jake brake will not come on until you lightly touch the brake pedal.

Per

Affinity 5259

Re: C-13 Jake Brake Question

Reply #2 –
Yahoo Message Number: 16935
Bob, have you dropped your speed low enough for the transmission to downshift into a lower gear? John 2002 Allure
#30702

Re: C-13 Jake Brake Question

Reply #3 –
Yahoo Message Number: 16941
Yes, the speed has dropped and it downshifts fine in 1st and 3rd range but not in 2nd range. I've forced a downshift in 2nd range and it holds back but just the same as 1st and 3rd.

Quote from: countryjrc
 

Re: C-13 Jake Brake Question

Reply #4 –
Yahoo Message Number: 16942
It didn't seem right to me. Thanks for confirming.

Bob

'05 Intrigue LE #11872

Quote from: Per Korslund\[br\
]
Bob,

If that is the way your Jake brake is working, it is not working
right. The only thing the three-position switch is doing is select whether the brake is activated on two, four or six cylinders, with increasing brake force with increase of number of cylinders used.
Once you turn the Jake on, the tranny should downshift as far as the RPMs allow. With the cruise control on, the transmission will still downshift, but the Jake brake will not come on until you lightly touch the brake pedal.

Quote
Per

Affinity 5259

Here is how our jake brake is working. In the low and high

positions

Quote
the transmission automatically downshifts to 4th gear and applies

the

Quote
jake brake. In middle position, no downshift occurs although it

seems

Quote
to apply the exhaust brake. Once the brake is on, there seems to

be

Quote
no difference in braking between any of the three positions. I > suspect this is not right but I'm looking for comments. Also, is

it

Quote
normal for the jake to not function if the cruise control is on?

If

Quote
so, why didn't CC wire the jake so that it cancels the cruise

instead

Quote
of the cruise cancelling the jake. If it's not normal, I'll put

it on

Quote
my fix list. Thanks.

Bob

'05 Intrigue LE #11872

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