Slipping Grip shift

[Eammno]

I have a Sachs 7 speed Gripshift that likes to change up every once in a while, usually while going up hill!
Is this the end for my Grip shift? I have a feeling there's nothing servicable with these, so I'm thinking a replacement is on the cards.

[Brucey]

inside an older gripshift there is usually a spring like this;



which is also the ratchet. Yup, only two moving parts! If a gripshift slips the likely cause is either that this spring is weak or that the teeth on the plastic part it bears against is incredibly worn.

If the spring is weak sometimes resetting it (i.e. opening it up a little) is enough, but if it is past that, you can buy a new spring (or perhaps scrounge one from the LBS if they keep used spares of that sort). If the plastic ratchet teeth are worn then you probably need another shifter.

You may find this page helpful

https://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Shifters/SRAM_Gripshift_3.0_%27comp%27_Cable_Replacement

cheers

[Eammno]

Many thanks for your advise Brucey!
You've linked to a SRAM page, is the innards of my Sachs shifter similar?
Need to pull it apart and take a look, I guess

[foxyrider]

Many thanks for your advise Brucey!
You've linked to a SRAM page, is the innards of my Sachs shifter similar?
Need to pull it apart and take a look, I guess

SRAM bought Sachs out - its the same stuff, different name

[Gattonero]

Be careful when you open them, some are a bit fiddly.
You may find a shop that still has the spares, there used to be a "tackle box" for the repair, old days....

[Eammno]

Finally got round to replacing the Gripshift, it's been a blimmin struggle holding the shifter in place while sitting at junctions, going up hills etc.
Anyway inside the old shifter the 'teeth' for 2nd, 3rd, 4th were all a lot flatter, and worn than the others so I've now got a nice new SRAM MRX Gripshift, that feels much better than the old Sachs ever did!
Thanks for all advice