6th gear whistling... - Page 2 - ZR-1 Net Registry Forums

TX '90 ZR1 · 11-10-2018

Everyone will have their own driving style, but I think the engine feels better with some revs going on. Think of it as the engine pulling instead of being pushed.
For normal driving around I downshift at around 2000 RPM. This basically makes it a 4 speed with 5th there sometimes.
May not be the most effecient for MPG, but hey, supposed to have fun. If worried about fuel mileage I'll get a Prius!!
As suggested, I'd change the tranny fluid if you don't know for sure what is in there. These ZF's are a little noisy and the right fluid will make a difference,
Here's a RPM vs speed chart to compare. Credit Marc Haibeck for the chart.

ZR-1 ZF6 MPH 345 vs 410 gear ratio-Haibeck.jpg

lfalzarano · 11-10-2018

As a general rule, the engine revs should stay at 2000 rpms or above in all gears. Lugging below that range puts mechanical strains on many engine components. JMHO

Sent from my iPhone using ZR-1 Net Registry

Young1 · 11-10-2018

Buy two quarts of AMSOIL synthetic manual synchromesh transmission fluid. Change it.

Sent from my iPhone using ZR-1 Net Registry

11-10-2018	#11
TX '90 ZR1 Join Date: Oct 2017 Location: TX Posts: 2,065	Re: 6th gear whistling... Everyone will have their own driving style, but I think the engine feels better with some revs going on. Think of it as the engine pulling instead of being pushed. For normal driving around I downshift at around 2000 RPM. This basically makes it a 4 speed with 5th there sometimes. May not be the most effecient for MPG, but hey, supposed to have fun. If worried about fuel mileage I'll get a Prius!! As suggested, I'd change the tranny fluid if you don't know for sure what is in there. These ZF's are a little noisy and the right fluid will make a difference, Here's a RPM vs speed chart to compare. Credit Marc Haibeck for the chart. ZR-1 ZF6 MPH 345 vs 410 gear ratio-Haibeck.jpg __________________ Kenny 1990 #442

11-10-2018	#12
lfalzarano Join Date: Feb 2011 Location: Clayton, North Carolina Posts: 1,133	6th gear whistling... As a general rule, the engine revs should stay at 2000 rpms or above in all gears. Lugging below that range puts mechanical strains on many engine components. JMHO Sent from my iPhone using ZR-1 Net Registry Last edited by lfalzarano; 11-10-2018 at 10:27 AM.

11-10-2018	#13
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 899	Re: 6th gear whistling... Buy two quarts of AMSOIL synthetic manual synchromesh transmission fluid. Change it. Sent from my iPhone using ZR-1 Net Registry __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.