Gripper Diffs & MOTs
23-05-2012, 03:51 PM
#1
Gripper Diffs & MOTs
Well the old banger is due a MOT next week 
I have not had a MOT since fitting the Gripper Diff.
Can it be tested on the brake rollers as im sure they turn one wheel backwards and the other forwards when doing the brake test ? I don't want my diff £ucked up.
Any advice ?
Steve
I have not had a MOT since fitting the Gripper Diff.
Can it be tested on the brake rollers as im sure they turn one wheel backwards and the other forwards when doing the brake test ? I don't want my diff £ucked up.
Any advice ?
Steve
Last edited by cossie4i+; 23-05-2012 at 04:22 PM.
23-05-2012, 04:23 PM
#7
Too many posts.. I need a life!!
Join Date: Jul 2003
Location: DUNSTABLE
Posts: 517
Likes: 0
Received 0 Likes
on
0 Posts
I've never had a problem with mine on the brake rollers only issues when they try get it off they normally go pale and ask me to move it about afterwards.
I had one mot test done where they had an above ground 4poster it was wet out and the tester didnt want me to put it on even tho I offered - it spun up an was sideways in the ramp he asked me to move it afterwards and I told him no cos he parked it.
they normally go pale and ask me to move it about afterwards. I had one mot test done where they had an above ground 4poster it was wet out and the tester didnt want me to put it on even tho I offered - it spun up an was sideways in the ramp
he asked me to move it afterwards and I told him no cos he parked it.
Trending Topics
23-05-2012, 04:25 PM
#8
Too many posts.. I need a life!!
iTrader: (3)
Join Date: May 2004
Posts: 629
Likes: 0
Received 0 Likes
on
0 Posts
My MOT man carries out a "visual" braking test.
Eg.. Drive across the car park and brake hard.
Not sure how kosher this is but he always asks what kind of diff it is then says "Ahh we best not stick it on the brake test rollers then."
Eg.. Drive across the car park and brake hard.
Not sure how kosher this is but he always asks what kind of diff it is then says "Ahh we best not stick it on the brake test rollers then."
23-05-2012, 04:38 PM
#13
cossie fan (unluckerly)
ask for it to be done on a tapping meter thats what i do as its almost a locked diff so i dont wont them damaging it spinning one wheel up at a time i can only imagine the racket it would make trying lol
Last edited by ajamesc; 23-05-2012 at 04:40 PM.
23-05-2012, 06:25 PM
#18
Zee Germans are coming
just ask for that to be used cos its got a funky diff fitted
23-05-2012, 06:30 PM
#19
cossie fan (unluckerly)
23-05-2012, 09:11 PM
#26
I'm Finding My Feet Here Now
any kind of limited slip diff shouldn't go in the rollers for the brake test, the tapley meter is used instead 
Torsen and quaife diffs don't seem to cause any trouble, as they behave like a normal open diff when there isn't any power through them
and a welded diff is a definate no no in the rollers
Torsen and quaife diffs don't seem to cause any trouble, as they behave like a normal open diff when there isn't any power through them
and a welded diff is a definate no no in the rollers
24-05-2012, 08:39 AM
#29
Advanced PassionFord User
Join Date: Jun 2003
Location: The BLACK COUNTRY
Posts: 1,797
Likes: 0
Received 0 Likes
on
0 Posts
As the presenter of a vehicle for MOT it is advisable to make the Tester aware of ANY modifications that you feel may affect the way an MOT is to be carried out.
A welded diff or even a heavily locked diff will certainly require the use of a Decelerometer - which is no hassle or fuss for the MOT station as this is a calibrated and accepted piece of test equipment and is a compulsary item of test equipment to be available to carry out an MOT
There are many types available but this is what they will look like (or similar) usually used for permanent 4 wheel drive vehicles
A welded diff or even a heavily locked diff will certainly require the use of a Decelerometer - which is no hassle or fuss for the MOT station as this is a calibrated and accepted piece of test equipment and is a compulsary item of test equipment to be available to carry out an MOT
There are many types available but this is what they will look like (or similar) usually used for permanent 4 wheel drive vehicles
Last edited by RS2000CUSTOM; 24-05-2012 at 08:41 AM.
24-05-2012, 09:34 AM
#30
Too many posts.. I need a life!!
Join Date: Jul 2003
Location: DUNSTABLE
Posts: 517
Likes: 0
Received 0 Likes
on
0 Posts
I've spoken to Tom Seal@gripper and he has said its not a problem for the mot it's not on the rollers long so the plate wear will be min and when the wheel stops it will engage the diff and lock up but by that point the test would be finished.
A welded diff is different tho.
I've had my diff for over 10years and never had an issue with mots.
A welded diff is different tho.
I've had my diff for over 10years and never had an issue with mots.
24-05-2012, 09:52 AM
#32
I've found that life I needed.. It's HERE!!
It`s not a problem to have 4x4 Cosworths on brake rollers, It`s over in seconds and don`t do harm. We also have a 4x4 program on our rollers
24-05-2012, 09:54 AM
#33
Lol @ the rollers going in different directions, where on earth did you get that info from?
Its obviously not just cock you smoke, it must be drugs too.
As RS2000CUSTOM has said, a decelerometer can be used when a car is too low to test or has an LSD, thats what I always get them to do on my cars that have LSDs in them.
Its obviously not just cock you smoke, it must be drugs too.
As RS2000CUSTOM has said, a decelerometer can be used when a car is too low to test or has an LSD, thats what I always get them to do on my cars that have LSDs in them.
24-05-2012, 02:00 PM
#35
Advanced PassionFord User
Join Date: Jun 2003
Location: The BLACK COUNTRY
Posts: 1,797
Likes: 0
Received 0 Likes
on
0 Posts
As stated before if u concerned about any part of the MOT Regarding your car then bring them to the attention of the tester BEFORE test starts - we do listen sometimes u know lol
Last edited by RS2000CUSTOM; 24-05-2012 at 02:02 PM.
, it seems you ain't always correct 
24-05-2012, 06:28 PM
#37
Advanced PassionFord User
Join Date: Jun 2003
Location: The BLACK COUNTRY
Posts: 1,797
Likes: 0
Received 0 Likes
on
0 Posts
This is the one that I use that runs rollers in opposite directions when in 4 x 4 mode
http://www.swge.co.uk/mot_major_test...ake_tester.asp
http://www.swge.co.uk/mot_major_test...ake_tester.asp
30-05-2012, 09:52 AM
#38
In northern ireland all cars go down the brake rollers. 4x4 are done 1 wheel at a time. The only car that doesnt have to is one with wire wheels because the rollers will wreck them and they get the tapley meter. welded diff throws the trip on the rollers and is not a tapley meter test its a fail. All cars with lsd are tested on rollers too.
