ZF Replacement? - ZR-1 Net Registry Forums

Scrrem · 12-01-2016

I have been reading the thread on the clutch replacement for our Z but that started me thinking of the transmission. With the NOS ZF's supply about dried up and no one seems to be reproducing the syncro's, has anyone looked into a replacement 6 speed gear box for the ZR-1? It seems like once we run out of parts the ZF may need a replacement. I talked to a rep from Tremec and they have a transmission but the shifter hole needed to be modified.
Rich

Billy Mild · 12-01-2016

When did they run out of synchro's?

FU · 12-01-2016

Sam (SAM/CH ZR-1) has been replacing the ZF's with a 6 speed closed ratio gearbox. Try to get him to post up. Jerry might be able to connect with him.

rkreigh · 12-08-2016

Hi Rich,

A few years back I talked to the guys at Tremec at Carlyle and Bill B. about doing this. it's feasible but not really sure how much the cost is to fab up a mounting for the cbeam and adapt the tranny to the LT5

I don't really think the ZF boxes are really that scarce, just the input shaft and bellhousing. But the modern boxes have really great strength, and great gear ratios.

Many of the brothers "stashed" another ZF when GM dumped them at 1880 a pop a while back. Every now and then they surface.

One of the tremec "godzilla" boxes had multiple input points for the shifter up top and looks like it would physically fit, the challenge again the lash up to the ZF

Another option (I know sacrilidge!!) is a modern paddle shifted auto. They aren't like the old slush boxes but will never provide the driving experience I crave.

Time to go get the LSV!!

Scrrem · 12-08-2016

Quote:

Originally Posted by rkreigh

Hi Rich,

A few years back I talked to the guys at Tremec at Carlyle and Bill B. about doing this. it's feasible but not really sure how much the cost is to fab up a mounting for the cbeam and adapt the tranny to the LT5

I don't really think the ZF boxes are really that scarce, just the input shaft and bellhousing. But the modern boxes have really great strength, and great gear ratios.

Many of the brothers "stashed" another ZF when GM dumped them at 1880 a pop a while back. Every now and then they surface.

One of the tremec "godzilla" boxes had multiple input points for the shifter up top and looks like it would physically fit, the challenge again the lash up to the ZF

Another option (I know sacrilidge!!) is a modern paddle shifted auto. They aren't like the old slush boxes but will never provide the driving experience I crave.

Time to go get the LSV!!

Yeah Ron, I just have my original black tag ZF that came out of my 90 and it has a bad syncro. I don't believe they are being made anymore and I know Bill has them, but they are pricey. Hell it would cost me $2500.00+ to have Bill rebuild this ZF. I was looking for a cheaper alternative but I guess I will just hang on to it just to have the input shaft and tail housing. I guess you can still find stand ZF's and just swap the input shaft.

The LSV looks good, may take a run down to Dempsey's on Sat.
Rich

BigIke · 12-16-2016

http://www.drivetrain.com/parts_cata...rhaul_kit.html

Sncro set 900?

12-01-2016	#1
Scrrem Join Date: Feb 2009 Location: Alexandria, Virginia Posts: 1,467	ZF Replacement? I have been reading the thread on the clutch replacement for our Z but that started me thinking of the transmission. With the NOS ZF's supply about dried up and no one seems to be reproducing the syncro's, has anyone looked into a replacement 6 speed gear box for the ZR-1? It seems like once we run out of parts the ZF may need a replacement. I talked to a rep from Tremec and they have a transmission but the shifter hole needed to be modified. Rich __________________ 1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member

12-01-2016	#2
Billy Mild Join Date: Aug 2014 Location: Kansas City, MO Posts: 836	Re: ZF Replacement? When did they run out of synchro's? __________________ Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration

12-01-2016	#3
FU Join Date: Mar 2004 Location: Found Member Posts: 4,341	Re: ZF Replacement? Sam (SAM/CH ZR-1) has been replacing the ZF's with a 6 speed closed ratio gearbox. Try to get him to post up. Jerry might be able to connect with him. __________________ Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237

12-08-2016	#4
rkreigh Join Date: Jan 2004 Location: Alex VA Posts: 1,081	Re: ZF Replacement? Hi Rich, A few years back I talked to the guys at Tremec at Carlyle and Bill B. about doing this. it's feasible but not really sure how much the cost is to fab up a mounting for the cbeam and adapt the tranny to the LT5 I don't really think the ZF boxes are really that scarce, just the input shaft and bellhousing. But the modern boxes have really great strength, and great gear ratios. Many of the brothers "stashed" another ZF when GM dumped them at 1880 a pop a while back. Every now and then they surface. One of the tremec "godzilla" boxes had multiple input points for the shifter up top and looks like it would physically fit, the challenge again the lash up to the ZF Another option (I know sacrilidge!!) is a modern paddle shifted auto. They aren't like the old slush boxes but will never provide the driving experience I crave. Time to go get the LSV!! __________________ 95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP)

12-16-2016	#6
BigIke Join Date: Aug 2014 Location: Montgomery TX Posts: 263	Re: ZF Replacement? http://www.drivetrain.com/parts_cata...rhaul_kit.html Sncro set 900? __________________ 1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car!