G box troubles

retro w124 w210

Senior Member
Joined
Feb 2, 2009
Messages
115
Reaction score
0
Location
HOME
Okay i have fited a box into my w124 300 the reverse works great lol.
when I drive in auto it goes up the gears nice but I cant get 4th gear ?? it just slips like its in neutral.
If i run up the gears ie 2nd then 3rd then into drive its slips and wont pull ANY IDEAS GUYS ?????
Thanks ReTrO
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
There is a known reason for this, I will check later in the day,its on my other computer
 
OP
R

retro w124 w210

Senior Member
Joined
Feb 2, 2009
Messages
115
Reaction score
0
Location
HOME
  • Thread Starter
  • Thread starter
  • #5
Hello I got the box from a Mercedes breakers I had a few problems with the pan gasket leaking a few times.
I went for a long drive on the weekend and the problem I get is that when its in Drive going up the gears it goes into 4th but when I feather the throttle it kicks down a gear TO 3RD before i have chance to increase the vehicles speed.
or if it doesnt kick down the revs increase and no speed is gained ie slip.
I dont know if i can adjust anything on the cable etc that maybe wrong ??.
I hope its no the box at fault again.???? ANY HELP IS GREAT :(
RetRO
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
3 things here.

A worn out torque converter will do this.

The kick down switch incorrectly set.

Or the control valve Y3/1Y2 is making poor contact via the solenoid
 
OP
R

retro w124 w210

Senior Member
Joined
Feb 2, 2009
Messages
115
Reaction score
0
Location
HOME
  • Thread Starter
  • Thread starter
  • #7
Okay well i will start with the easy things first lol, have you got info on seting the kick down switch and how do i check the control valve???
Thanks
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
I have sent some voltage checks that you can do.

The throttle cable can be checked by seeing that the kick down is not cutting in at the full throttle just before kickdown
 

Wellington

Active Member
Joined
Mar 25, 2009
Messages
32
Reaction score
0
In my experience I would expect to see the two shaft sealing rings right at the rear of the transmission damaged, the rearmost clutch is used for fourth gear and the seals on the hub bolted to the gearbox casing wear, early types were a soft grey material later replaced by a white plastic material.
Regards Wellington
 

Wellington

Active Member
Joined
Mar 25, 2009
Messages
32
Reaction score
0
You will have to remove and strip the transmission to find the sealing rings I mention
 


GAD was founded in 2009 where we developed bespoke ECU Remapping software for motorsport clients, moving forward, we have extended to road vehicles for both performance and economy,
contact GAD Tuninghttp://www.GADTuning.co.ukto discuss your requirements.
Top Bottom