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Speedo acting up

My speedo is acting up. Can someone tell me what the RPM would be at 65mph. I pull a vehicle which limits speed to 65. If the speedo starts acting I want to use the tach as my speedo.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30

Re: Speedo acting up

Reply #1 –
Different coaches, different gear ratios and different tire sizes make it hard to guess your situation. If it works intermittently mark the rpm down for your coach for the main speed limits.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Speedo acting up

Reply #2 –
To find the rpm readings you could do a test drive with a gps that shows your speed or your phone there's an app for that.
Toby a 94 u280
Cummins 8.3
6 speed Allison
Exhaust brake


Adopted by Derek and Annabelle

Re: Speedo acting up

Reply #3 –
If you have a smart phone you can download a GPS speedometer app and then make a cheat sheet of speeds at various rpm's in different gears.

As a side note, IMO, I doubt that your toad would be mechanically harmed by any speed that you would care to be driving your coach.
Dave and Kelli
1997 U295 40' Build #5188 CSGI
1995 U240 36' Build #4621 SBID-SOLD
2006 Jeep Wrangler Rubicon

Re: Speedo acting up

Reply #5 –
3.91 gears on a m11 u320.

65 is 1450?
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Speedo acting up

Reply #6 –
Thanks for the help. I will use the app off the phone. Bob I have a 3176 cat, and if my memory is correct I think your 1450rpm is pretty close.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30

Re: Speedo acting up

Reply #7 –
Just went 900 miles in a week.  But I tow where legal at 75.  Some Nevada, Arizona and  Utah.  1596 rpms.

36,000 pounds combined.  OC to Vegas to Zion to OC 8.0 mpg.  I do not baby this.  Drive it hard as it can go when needed.





"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Speedo acting up

Reply #8 –
Its not the rv that's my concern. Gm products that are flat towed limit the towing speed to 65.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30

Re: Speedo acting up

Reply #9 –
So was my element and is my tracker. Regularly tow at 80 with no issue or damage
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: Speedo acting up

Reply #10 –
Quote from: joeszeidel –
Its not the rv that's my concern. Gm products that are flat towed limit the towing speed to 65.
If it were me I would follow my vehicle owners manual. It reads 65mph so be it don't care what speeds others travel. Sometimes I do follow the mfr's guidelines.

Roland
1993 U280 4341
2010 Jeep Liberty
The Pied Pipers

Re: Speedo acting up

Reply #11 –
Quote from: Roland Begin –
If it were me I would follow my vehicle owners manual. It reads 65mph so be it don't care what speeds others travel. Sometimes I do follow the mfr's guidelines.

Yup, one learns, after checking what the max RPM is, to "drive by the tach". ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Speedo acting up

Reply #12 –
IIRC, I think our '97 Tracker is limited to 55 MPH when towed.  It happily follows along at 75-80 where speed limit and conditions allow. 
Dave and Kelli
1997 U295 40' Build #5188 CSGI
1995 U240 36' Build #4621 SBID-SOLD
2006 Jeep Wrangler Rubicon
 

Re: Speedo acting up

Reply #13 –
Quote from: joeszeidel –
My speedo is acting up. Can someone tell me what the RPM would be at 65mph. I pull a vehicle which limits speed to 65. If the speedo starts acting I want to use the tach as my speedo.

If you use a GPS it should show you your traveling speed on the screen.

John M.
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."