Club G40 Forum

Technical => Engine and Transmission => Topic started by: Andy on February 25, 2012, 09:43:25 PM

Title: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: Andy on February 25, 2012, 09:43:25 PM
Anyone else have this issue? Just pulled the engine out and had to break the inner CV joint apart to separate the gearbox from the driveshaft. It took a lot of heat and even more hammer to separate the remains of the CV from the output flange.

Looks like it'd got a bit warm:

(http://img.photobucket.com/albums/v467/amstrange1/IMG_5004.jpg)
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: hayesey on February 27, 2012, 09:05:38 AM
hmm not had the issue myself but I seem to recall yoof having the same problem.
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: Andy on February 27, 2012, 12:49:50 PM
Yeah, Yoof deffo has had the issue.

Are you using GSF CVs on yours Hayes?
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: Raw on February 27, 2012, 12:51:34 PM
That heat affected pattern looks too regular. Could it be from hardening during manufacture?
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: youngprodigys on February 27, 2012, 12:58:42 PM
i had the same issue- part bought from GSF- heat patterns were they from new- its the grinding operation heat i think.
i ruined the CV getting it off as i just smashed it off.
i thought it was because i forgot to pit the lil paper gasket in and it went to far- actually made no difference, incorrect dimension i think. il measure it later and find out how much of an interference fit it was.
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: youngprodigys on February 27, 2012, 12:59:41 PM
additional note- only happened on my O/S drive, N/S was fine and they were bought together
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: hayesey on February 27, 2012, 04:41:41 PM
Quote from: Andy on February 27, 2012, 12:49:50 PM
Yeah, Yoof deffo has had the issue.

Are you using GSF CVs on yours Hayes?

no, old but genuine ones.
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: Andy on February 27, 2012, 07:23:25 PM
The plot thickens! So is this yet another service item we need to avoid GSF for?!

Mine is/was a GKN item, which is why I was relaxed about using it given that they're the CV and driveshaft daddies for the OEMs. However, I'm wondering whether GSF are selling the incorrect part?

When I get a minute I'll see if I can get some verniers on a genuine CV and compare.
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: youngprodigys on February 27, 2012, 10:37:19 PM
ive still got the box my CVs came in! i could tell you the GKN part number!
the CV joint itself itsnt an issue and has done alright - its just the actual fit into the drive flange isnt it.

And il add a bit more plot to thicken this up, my initial though as to why this went tits up was the driveshaft length issue on early/late
did they also have different sizes on the flange???
Title: Re: Uprated driveshaft: inner CV sticking in gearbox output flange
Post by: Andy on March 13, 2012, 08:24:52 PM
Looks like the GKN CV that GSF supplied is very slightly oversized. Should be an easy fix with a bit of emery for when it goes back together.