GM Wheel Cylinder ?
02-26-2005, 08:58 AM
#1
Registered User
Thread Starter
Join Date: Jul 2003
Posts: 53
Likes: 0
Received 0 Likes
on
0 Posts
GM Wheel Cylinder ?
I was checking my rear breaks this week to see how much life they have in them. There is still a few more miles left but one wheel cylinder looks like it is starting to leak. I have been reading about the people who have changed to the GM cylinders. This is on the 99 2500 truck and I have a few questions.
Are there any mods that need to be made or does everything fit the same?
Does it effect the ABS any?
What are your impressions of the change?
Do you have the part #s at hand?
Thanks in advance for any information. I will start planning for rear breaks in the next few weeks.
Arcc
Are there any mods that need to be made or does everything fit the same?
Does it effect the ABS any?
What are your impressions of the change?
Do you have the part #s at hand?
Thanks in advance for any information. I will start planning for rear breaks in the next few weeks.
Arcc
02-26-2005, 09:58 AM
#2
Registered User
No mods were neeed on my 98.5.
IMHO a very worth while change.
Sorry I dont remember the part # off hand but if you do a search on Nappa wheel cyl I'm sure you will find it eazy.
IMHO a very worth while change.
Sorry I dont remember the part # off hand but if you do a search on Nappa wheel cyl I'm sure you will find it eazy.
NAPA cylinders
02-26-2005, 11:34 AM
#5
Registered User
It's a perfect fit, no other mods needed, just a lttle brake fluid to bleed.
You'll definitely feel and like the difference.
The 4637337 number will cross over at most auto parts stores.
You'll definitely feel and like the difference.
The 4637337 number will cross over at most auto parts stores.
02-26-2005, 01:42 PM
#7
Registered User
Join Date: Nov 2002
Location: outside of Duluth MN
Posts: 1,234
Likes: 0
Received 0 Likes
on
0 Posts
I believe the differance is going from a 27mm cylinder to a 31mm cylinder. It requires a lot less pedal pressure to stop AND the truck won't nosedive but instead just kinda squats and stops.
Tom
Tom
Trending Topics
02-26-2005, 01:58 PM
#8
Registered User
Join Date: Aug 2003
Location: Jeffersonville, Ohio
Posts: 3,604
Likes: 0
Received 0 Likes
on
0 Posts
Don't the 2500's use 24mm wheel cylinders, and the 3500's used the 27mm's.
The GM's ARE 30mm, that I'm sure of
.
Either way, it doesn't matter...It's like a 25% increase in rear braking power
Chris
The GM's ARE 30mm, that I'm sure of
.Either way, it doesn't matter...It's like a 25% increase in rear braking power
Chris
02-26-2005, 06:08 PM
#10
Registered User
3500s have always had 27mm cylinders, 2500s had 24mm until '97 then switched to 27mm.
Going from a 27mm to a 30mm increases braking force by 23%, very noticable.
Going from a 27mm to a 30mm increases braking force by 23%, very noticable.
02-26-2005, 07:08 PM
#12
Registered User
Originally posted by infidel
3500s have always had 27mm cylinders, 2500s had 24mm until '97 then switched to 27mm.
Going from a 27mm to a 30mm increases braking force by 23%, very noticable.
3500s have always had 27mm cylinders, 2500s had 24mm until '97 then switched to 27mm.
Going from a 27mm to a 30mm increases braking force by 23%, very noticable.
02-26-2005, 09:48 PM
#13
Registered User
Originally posted by nevrenufhp
The 3500 single rears are 27mm, and the dually is 30mm. The napa number was a (46)37337, and that fits a dually.
The 3500 single rears are 27mm, and the dually is 30mm. The napa number was a (46)37337, and that fits a dually.
02-27-2005, 08:35 AM
#14
Registered User
Sorry, I just realized that this morning . Why cant they go back to the way it was back when Ford was F1,2,3,etc , and Dodge was 100,200,300,etc , and GM was ....well, whatever they felt like 3100,3600?
. Why cant they go back to the way it was back when Ford was F1,2,3,etc , and Dodge was 100,200,300,etc , and GM was ....well, whatever they felt like 3100,3600?
02-28-2005, 03:29 AM
#15
Registered User
Join Date: Mar 2004
Location: FL
Posts: 1,058
Likes: 0
Received 0 Likes
on
0 Posts
I had to bend the rear brake lines a little. I think because I have the last version of the rear drum brakes systems. 
I noticed it, and would do it again. No noticed affect on ABS. Only felt it once or twice, that was after the cylinder mod. Don't remember if it ever kicked in before. -Bob
I noticed it, and would do it again. No noticed affect on ABS. Only felt it once or twice, that was after the cylinder mod. Don't remember if it ever kicked in before. -Bob
Thread
Thread Starter
Forum
Replies
Last Post
Gen414
3rd Gen Engine and Drivetrain -> 2003-2007
2
05-07-2009 11:08 AM
cgmorgan06
3rd Gen Engine and Drivetrain -> 2007 and up
3
11-15-2007 04:02 PM
Journier
General Diesel Discussion
11
11-22-2004 02:56 PM