Hurst Shifter Difficult 3rd - ZR-1 Net Registry Forums

KPW · 09-02-2015

Hi All,

I've been enjoying my ZR-1 as much as the fair weather allows, and digging into a ton of these forum posts. Awesome.

I've found that while driving (and parked with the engine off) selecting 3rd gear can hang up a bit in the shifter. I have a Hurst that the PO installed. Has anyone had a similar issue?

Just changed the trans fluid tonight (haven't driven yet but still same engine off feeling), clutch level seems OK, and I've done the ZFDoc clutch hydraulics test (coasting down once at temp and pushing the clutch in, waiting 2 sec, and then selecting 1st and reverse), and everything seems smooth there.

I might have some time in the next few days to dig into the console and inspect the shifter from above. Anything I should keep an eye out for?

Thanks!

Kelby

UPDATE: Just drove it. Seems to hang up only sometimes. Played with it idling in the driveway a bit, seems smooth most times, then seems to bind up and not fully achieve 3rd (sometimes 2nd and 4th as well). Starting to think it's just not lining up right sometimes, maybe needs rebuilt? Tough to say as I don't know much about the mechanics of this shifter.

Overall shift quality was improved by changing the trans oil though so that's good!

XfireZ51 · 09-02-2015

Quote:

Originally Posted by KPW

Hi All,

I've been enjoying my ZR-1 as much as the fair weather allows, and digging into a ton of these forum posts. Awesome.

I've found that while driving (and parked with the engine off) selecting 3rd gear can hang up a bit in the shifter. I have a Hurst that the PO installed. Has anyone had a similar issue?

Just changed the trans fluid tonight (haven't driven yet but still same engine off feeling), clutch level seems OK, and I've done the ZFDoc clutch hydraulics test (coasting down once at temp and pushing the clutch in, waiting 2 sec, and then selecting 1st and reverse), and everything seems smooth there.

I might have some time in the next few days to dig into the console and inspect the shifter from above. Anything I should keep an eye out for?

Thanks!

Kelby

UPDATE: Just drove it. Seems to hang up only sometimes. Played with it idling in the driveway a bit, seems smooth most times, then seems to bind up and not fully achieve 3rd (sometimes 2nd and 4th as well). Starting to think it's just not lining up right sometimes, maybe needs rebuilt? Tough to say as I don't know much about the mechanics of this shifter.

Overall shift quality was improved by changing the trans oil though so that's good!

Has the clutch fluid been changed?

KPW · 09-02-2015

Haven't changed the clutch fluid...what's the consensus on the easiest way for that? I have a fresh can of DOT4.

George Maz · 09-02-2015

Thank you for posting, same issue here.
Happens randomly shifting out of second, like it's getting hung up on something. Happened once coming out of first, made a loud "pop bang". There is no gear grinding whatsoever, and this happens during hard running & sunday driving. About a dozen occurrences in 200miles.
Hurst Shifter, aftermarket grip (that I like)
Fidanza flywheel, oem slave cylinder

I'm a confident shifter, sometimes upshifting without the clutch. Also recently relearned to not "ride the clutch" which was a bad habit I didn't realize was detrimental to internal parts.

XfireZ51 · 09-02-2015

I have used this method from Ranger for several years with real effectiveness.

http://youtu.be/gBbsy0LjUvE

KPW · 09-03-2015

Flushed a whole can through the system with Ranger's method. Still a little dirty so I'll continue with that periodically to try and clean it up good.

Did some more investigation with the shifter hang up issue...seems to happen even without the clutch (engine off) which still seems to point to the shifter? Strange to me is the intermittent nature of this issue.

RussMcB · 09-03-2015

Just tossing out a question ...

Are you sure it's the shifter and not the trans?

Perhaps we can ask if anyone has had this issue with the stock shifter. If not, then you're probably right.

There's a rubber boot underneath the car. I suppose you could shoot some lithium grease in there, but it's a pain to work with. Therefore, I'd think it'd be easier to go in from the top to apply some new grease, and, if you're lucky, maybe recreate the issue while you're looking at the shifter workings.

Good luck.

efnfast · 09-03-2015

I love to hear this stuff as I'm in the throws of installing a Hurst. Been at the mechanics for a week and a half. Whole new thread when it's over.

WVZR-1 · 09-03-2015

I've seen the 3d gear issue mentioned many times in the past and I understand that's likely very easily corrected from "under the car" with three parts and minimal time. A detent ball and two springs accessible just forward of the CAGS. ZF DR mentions it in his FAQ.

Part ID'd as 627, 628 & 629 in his "shift system group" from this link

http://www.zfdoc.com/S640Parts.htm

Could it be a shifter issue? Maybe. Likely? I've no idea.

I'm starting a new thread looking for some ZF shifter help right now.

GOLDCYLON · 09-03-2015

Quote:

Originally Posted by XfireZ51

I have used this method from Ranger for several years with real effectiveness.

http://youtu.be/gBbsy0LjUvE

Awesome post up Dom thanks for sharing. I now have a weekend job

09-02-2015	#1
KPW Join Date: Jul 2015 Location: Ypsilanti, MI Posts: 114	Hurst Shifter Difficult 3rd Hi All, I've been enjoying my ZR-1 as much as the fair weather allows, and digging into a ton of these forum posts. Awesome. I've found that while driving (and parked with the engine off) selecting 3rd gear can hang up a bit in the shifter. I have a Hurst that the PO installed. Has anyone had a similar issue? Just changed the trans fluid tonight (haven't driven yet but still same engine off feeling), clutch level seems OK, and I've done the ZFDoc clutch hydraulics test (coasting down once at temp and pushing the clutch in, waiting 2 sec, and then selecting 1st and reverse), and everything seems smooth there. I might have some time in the next few days to dig into the console and inspect the shifter from above. Anything I should keep an eye out for? Thanks! Kelby UPDATE: Just drove it. Seems to hang up only sometimes. Played with it idling in the driveway a bit, seems smooth most times, then seems to bind up and not fully achieve 3rd (sometimes 2nd and 4th as well). Starting to think it's just not lining up right sometimes, maybe needs rebuilt? Tough to say as I don't know much about the mechanics of this shifter. Overall shift quality was improved by changing the trans oil though so that's good! Last edited by KPW; 09-02-2015 at 08:41 PM. Reason: UPDATE

09-02-2015	#3
KPW Join Date: Jul 2015 Location: Ypsilanti, MI Posts: 114	Re: Hurst Shifter Difficult 3rd Haven't changed the clutch fluid...what's the consensus on the easiest way for that? I have a fresh can of DOT4.

09-02-2015	#4
George Maz Join Date: Dec 2014 Location: Long Island, NY Posts: 295	Re: Hurst Shifter Difficult 3rd Thank you for posting, same issue here. Happens randomly shifting out of second, like it's getting hung up on something. Happened once coming out of first, made a loud "pop bang". There is no gear grinding whatsoever, and this happens during hard running & sunday driving. About a dozen occurrences in 200miles. Hurst Shifter, aftermarket grip (that I like) Fidanza flywheel, oem slave cylinder I'm a confident shifter, sometimes upshifting without the clutch. Also recently relearned to not "ride the clutch" which was a bad habit I didn't realize was detrimental to internal parts. __________________ 1990 ZR-1 #1587 1990 ZR-1 #1727

09-02-2015	#5
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,661	Re: Hurst Shifter Difficult 3rd I have used this method from Ranger for several years with real effectiveness. http://youtu.be/gBbsy0LjUvE __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

09-03-2015	#6
KPW Join Date: Jul 2015 Location: Ypsilanti, MI Posts: 114	Re: Hurst Shifter Difficult 3rd Flushed a whole can through the system with Ranger's method. Still a little dirty so I'll continue with that periodically to try and clean it up good. Did some more investigation with the shifter hang up issue...seems to happen even without the clutch (engine off) which still seems to point to the shifter? Strange to me is the intermittent nature of this issue.

09-03-2015	#7
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Hurst Shifter Difficult 3rd Just tossing out a question ... Are you sure it's the shifter and not the trans? Perhaps we can ask if anyone has had this issue with the stock shifter. If not, then you're probably right. There's a rubber boot underneath the car. I suppose you could shoot some lithium grease in there, but it's a pain to work with. Therefore, I'd think it'd be easier to go in from the top to apply some new grease, and, if you're lucky, maybe recreate the issue while you're looking at the shifter workings. Good luck.

09-03-2015	#8
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,239	Re: Hurst Shifter Difficult 3rd I love to hear this stuff as I'm in the throws of installing a Hurst. Been at the mechanics for a week and a half. Whole new thread when it's over.

09-03-2015	#9
WVZR-1 Join Date: Oct 2004 Posts: 1,889	Re: Hurst Shifter Difficult 3rd I've seen the 3d gear issue mentioned many times in the past and I understand that's likely very easily corrected from "under the car" with three parts and minimal time. A detent ball and two springs accessible just forward of the CAGS. ZF DR mentions it in his FAQ. Part ID'd as 627, 628 & 629 in his "shift system group" from this link http://www.zfdoc.com/S640Parts.htm Could it be a shifter issue? Maybe. Likely? I've no idea. I'm starting a new thread looking for some ZF shifter help right now.