GripShift/Shimano not playing nicely; also Shimano freehub Q

[garethrl]

Hi Guys,
I've been putting together a town bike for my father (he's very excited about it) but I'm have trouble with the rear shifting. Up front is a GripShift SRT 400 FFS 7-speed shifter, while out back I have a Shimano RD M739 mech and unidentified Shimano 7-speed cassette. Shifting is pi$$-poor and pretty random.

Is this combination doomed to failure from the outset due to cable pull mismatch? Or is it more likely to be due to one of the components being past its best? If the combination simply won't work and one needs to be replaced, I guess I'd be better ditching the GS - so which similar shifter would work? He wants GS-type, not thumbies or rapidfire.

Also, the freehub is on its last legs, probably its last leg in fact. The hub is an M732 model - are current Shimano freehub bodies backwards compatible with this hub? Which works best? Or do I need to look for a direct replacement?

Thanks in advance,
Gareth.

 

[Agency_Scum]

The SRT 400 worked only with a Sram rear mech not a Shimano. There's your problem.

 

[hamster]

Shimano freehub bodies are compatible - you need to make sure that you get a 7 speed one though.

edit: typo

 

[slimpee]

The SRT 400 worked only with a Sram rear mech not a Shimano. There's your problem.

You sure? I remember a buddy of mine having a Trek w/ SRT-400 and an STX rear derailleur.

EDIT: Found it. http://www.bikepedia.com/QuickBike/Bike ... &Type=bike

 

[Agency_Scum]

It was a long time ago. Let me double check me facts with some gurus.

 

[KonaJJ]

Kona produced a Lave Dome with GS400 & Shimano Deore LX rear mech and it works a treat, dont think thats the problem.