(Advertisements are not shown for registered users)

CRX HF shift light stays on

Got a problem with your stock CRX? This is where you should start.

Moderator: Moderators

CRX HF shift light stays on

Postby wspangle » Sat Mar 11, 2017 11:47 am

I have a stock 90 CRX HF that is having an issue with the shift light - it stays on in 5th gear. It operates correctly through all gears and it acts like there is supposed to be another gear after 5. It is kind of annoying since I drive on the interstate every night.

Could this be an indication of Ecu issues?
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am

Re: CRX HF shift light stays on

Postby BillyZoom » Sat Mar 11, 2017 10:57 pm

Disconnect it or take the bulb out. You don't need a light to tell you when to shift.
California models didn't come with them.
BillyZoom
 
Posts: 42
Joined: Sat Aug 11, 2012 2:42 pm

Re: CRX HF shift light stays on

Postby 4drSpankR » Sat Mar 11, 2017 10:59 pm

The light is designed for the best possible MPGs', no you don't need it but it is sometimes useful to have.


Where are you located??
1991 HF - previously '90 B18A1 now '97 B18C1
1989 Si - running parts car/gone
User avatar
4drSpankR
 
Posts: 2245
Joined: Fri Mar 23, 2007 8:12 pm
Location: Lancaster, PA

Re: CRX HF shift light stays on

Postby msc » Tue Mar 14, 2017 7:49 pm

Your transmission has most likely been swapped so your ECU sees an RPM vs. MPH that looks like 3rd gear (guessing it's a DX trans) when your in 5th. If you have a California HF transmission your 5th gear would like about 4th gear to a 49 state ECU.

You can disable the light by removing the rubber bumper from the lower of the two switches on your clutch pedal. To restore full functionality would require replacing the transmission with an HF trans of the same emission code. I'm guessing you have a 49 state car but there is a small possibility it's the high altitude version. The California version does not have the shift light.

Mike
msc
 
Posts: 3783
Joined: Wed Jun 04, 2008 12:18 pm
Location: S. E. Michigan

Re: CRX HF shift light stays on

Postby wspangle » Sat Mar 18, 2017 1:59 am

I know I can just remove the bulb, but I'm the kind of person who would rather fix the issue so it works correctly than to just disable it (and yes, I know when to shift the car to get the best fuel economy without the light). I will not remove the bulb unless to replace it because it burnt out.

Now, to the person who suggested that the trans has been swapped, how could I identify the transmission I have in the car? I know I can drive at 70 in 5th gear and pay attention to the RPMs and find out that way, but is there a certain number stamped on it?
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am

Re: CRX HF shift light stays on

Postby wspangle » Sat Mar 18, 2017 2:03 am

I'm in Tennessee but the car came from New Mexico. If I'm not mistaken, it was bought brand new there, so it is a 49 state car.
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am

Re: CRX HF shift light stays on

Postby msc » Sat Mar 18, 2017 12:18 pm

Tach indication at known speeds should be a good option other then the tachs in these cars often have errors. Typically the tach error will be to read low so a DX transmission could give tach indications that look like an HF. An HF transmission should give you about 2100 to 2200 (depending on tire size) at 70 MPH in 5th gear but like I said there are likely tach errors.

For positive identification you need to determine the gear ratio by comparing turns of the input verses output shafts. See this thread for gear ratio information. viewtopic.php?t=246

With the transmission in the car the best way to do this will be with one front wheel raised off the ground and the other wheel blocked. When doing this the differential will double the turns of the raised wheel so be sure to take this into account when comparing turns.

Mike
msc
 
Posts: 3783
Joined: Wed Jun 04, 2008 12:18 pm
Location: S. E. Michigan

Re: CRX HF shift light stays on

Postby wspangle » Sat Mar 18, 2017 2:50 pm

While driving around town today, I noticed that at 45 MPH in 5th gear, the tachometer was at 2,250 RPMs. At 60 MPH in 5th gear, the tachometer was reading 3,000 RPMs.
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am

Re: CRX HF shift light stays on

Postby 4drSpankR » Sat Mar 18, 2017 4:40 pm

wspangle wrote:While driving around town today, I noticed that at 45 MPH in 5th gear, the tachometer was at 2,250 RPMs. At 60 MPH in 5th gear, the tachometer was reading 3,000 RPMs.



Yeah that certainly isn't an HF trans.
1991 HF - previously '90 B18A1 now '97 B18C1
1989 Si - running parts car/gone
User avatar
4drSpankR
 
Posts: 2245
Joined: Fri Mar 23, 2007 8:12 pm
Location: Lancaster, PA

Re: CRX HF shift light stays on

Postby Myriad » Sun Mar 19, 2017 12:59 pm

Is it just me, or did my post disappear?
I got a new shell, just need to stop driving the DX so I can work on it.

I've got a filter for my mouth, it just isn't a good one.
Myriad
 
Posts: 340
Joined: Sat Oct 10, 2015 5:49 pm
Location: Ohio

Re: CRX HF shift light stays on

Postby 4drSpankR » Mon Mar 20, 2017 10:37 am

Myriad wrote:Is it just me, or did my post disappear?



It's gone, I remember seeing it in this thread as well.
1991 HF - previously '90 B18A1 now '97 B18C1
1989 Si - running parts car/gone
User avatar
4drSpankR
 
Posts: 2245
Joined: Fri Mar 23, 2007 8:12 pm
Location: Lancaster, PA

Re: CRX HF shift light stays on

Postby BillyZoom » Mon Mar 20, 2017 6:36 pm

On a 1990 California HF, 60mph is 2000RPM. In the other 49 states. RPM will be even lower.
Just shift at 4000RPM. The rev limiter kicks in around 5200, but you're way off cam by then.
I don't know what kind of performace to expect from an HF with another trans. The HF engine isn't meant to be a revver. BTW, Are you sure you have an HF engine? It should have 8 valves and the CAT right on the front of the engine.
BillyZoom
 
Posts: 42
Joined: Sat Aug 11, 2012 2:42 pm

Re: CRX HF shift light stays on

Postby msc » Mon Mar 20, 2017 9:37 pm

3000 RPM at 60 sounds like an Si transmission. How sure are you that you have an HF engine? Seems likely that if the transmission was swapped to an Si trans the engine could have been swapped too. For an HF the engine block code is D15B6.

Mike
msc
 
Posts: 3783
Joined: Wed Jun 04, 2008 12:18 pm
Location: S. E. Michigan

Re: CRX HF shift light stays on

Postby wspangle » Thu Mar 23, 2017 10:00 am

I'm 100% positive I have the D15B6 (HF engine). It is stamped on the block and I rebuilt the head which only has 8 valves.

Does anyone know where I can find a good HF trans?
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am

Re: CRX HF shift light stays on

Postby BillyZoom » Sun Mar 26, 2017 10:50 pm

Again, be aware that the California HF trans had a different final drive ratio and is not compatible with the shift light. It would still make your car more driveable and economical though. Stake the input bearing before you install a different tranny. They always back out and make noise in neutral. It's an easy fix when the unit isn't in the car.
BillyZoom
 
Posts: 42
Joined: Sat Aug 11, 2012 2:42 pm

Re: CRX HF shift light stays on

Postby msc » Mon Mar 27, 2017 6:52 am

BillyZoom wrote:Stake the input bearing before you install a different tranny. They always back out and make noise in neutral.

That is incredibly bad advice.

For starters the bearing makes noise when it's bad. When installed properly there is a conical spring washer that holds end pressure on the input shaft bearings. There is a procedure for selecting the correct shim to set the end load on the bearing. Staking would in no way make up for proper setting of the bearing pre-load.

The factory service manual is a wealth of information that should be referred to whenever working on a car.

Mike
msc
 
Posts: 3783
Joined: Wed Jun 04, 2008 12:18 pm
Location: S. E. Michigan

Re: CRX HF shift light stays on

Postby BillyZoom » Thu Apr 13, 2017 3:37 pm

There are a couple of good articles here in the archives about staking the bearing. That's where I got the info.
BillyZoom
 
Posts: 42
Joined: Sat Aug 11, 2012 2:42 pm

Re: CRX HF shift light stays on

Postby wspangle » Sat Apr 15, 2017 4:18 pm

Problem solved!
I was able to find a guy selling a good HF trans that came out of his car (he was swapping to a more powerful drivetrain) with a little over 203k miles on it.
I changed out the transmissions and now the shift light does not stay on in 5th gear.
Also, at 70 mph, I'm sitting at around 2,225 RPMs with 175/70 13s :bounce:
wspangle
 
Posts: 44
Joined: Thu Sep 22, 2016 12:35 am


Return to Stock Garage

Who is online

Users browsing this forum: Yahoo [Bot] and 6 guests