The 8th Gen Riviera Resource
 
HomeDashboardSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksLog in

Share
 

 95 Riv Overdrive

Go down 
AuthorMessage
SamsSC
Newbie


Name : Sam
Age : 58
Location : Long Beach CA
Joined : 2008-06-26
Post Count : 9
Merit : 0

95 Riv Overdrive Empty
PostSubject: 95 Riv Overdrive   95 Riv Overdrive EmptyTue Sep 02, 2008 7:12 pm

I took a trip in my 95 Super Charged Riv from L.A. to Central Cal. I was taking my son and his cargo to college. His stuff filled the trunk and the back seat. My wife rode in the passenger side.

I would say there was 200+ pounds of cargo.. my wife and I together added 325 more pounds. Didn't seem like a big deal to me.

The self-leveling suspension worked perfectly with no sagging or bottoming out.

However, once we got going I noticed it never shifted in overdrive (never). When I got up around 75mph the engine was 3000rpm. Consequently, I got about 17mpg.
.

Once we unloaded on the way back I got 27mpg. at 70mph the engine was at 1800-2000rpm.

I understand the system detected the extra weight and prevented OD, but on open flat highway OD should have kicked in. OD should only be prevented during acceleration, inclines etc. I wondered is there any malfunction (trans fluid full, no warning lights).

Advise.. anyone?
Back to top Go down
deekster_caddy
Master


Name : Derek
Age : 47
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyTue Sep 02, 2008 7:58 pm

You are correct, it should have dropped into OD under light throttle and basic cruise. Was your wife holding the shifter in D? wink
Back to top Go down
Buickman104
Enthusiast


Age : 34
Location : New York City
Joined : 2007-11-29
Post Count : 156
Merit : 0

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyWed Sep 03, 2008 11:20 am

The 4T60 transmission tends to run hot. Particularly when there is extra load on it. Once it get's hot enough it will not hold overdrive. If you have access to a scanner try scanning to see your trans temperatures. Usually anything above 210-220 degrees the trans will not hold overdrive.
Back to top Go down
SamsSC
Newbie


Name : Sam
Age : 58
Location : Long Beach CA
Joined : 2008-06-26
Post Count : 9
Merit : 0

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyWed Sep 03, 2008 12:27 pm

Buickman104 wrote:
The 4T60 transmission tends to run hot. Particularly when there is extra load on it. Once it get's hot enough it will not hold overdrive. If you have access to a scanner try scanning to see your trans temperatures. Usually anything above 210-220 degrees the trans will not hold overdrive.

Thanks......
Back to top Go down
TypetoHarry
Amateur


Joined : 2007-09-12
Post Count : 42
Merit : 0

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyWed Sep 03, 2008 2:05 pm

I have this problem with my 95 as well. Is there anyway to solve it?
Back to top Go down
deekster_caddy
Master


Name : Derek
Age : 47
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyWed Sep 03, 2008 3:03 pm

As stated above, find out your T-fluid temp. Try adding a cooler?
Back to top Go down
Josh Higgins
Newbie
Josh Higgins

Name : poor mans cadillac
Age : 40
Location : Tn
Joined : 2012-09-10
Post Count : 8
Merit : 0

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyMon Sep 24, 2012 8:19 pm

lost overdrive pulling a hill change fluid or, when it cooles down will it come back?
Back to top Go down
albertj
Master
albertj

Name :
Location : Finger Lakes of New York State
Joined : 2007-05-31
Post Count : 7570
Merit : 153

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyMon Sep 24, 2012 8:36 pm

...also check if your front brakes are dragging. Raybestos makes little springs to discourage brake pad drag (look under brake pads on RockAuto.com for them). That extra drag can conceivably keep you our of OD if you're loaded enough.
Back to top Go down
AA
Administrator
AA

Name : Aaron
Age : 42
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18370
Merit : 241

95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive EmptyTue Sep 25, 2012 8:33 am

Need to determine what you mean exactly by "lost overdrive". There are two components needed for OD to work properly: 4 gear and torque converter clutch lock-up. Did you lose 4th gear, or did the TCC stop working? Usually TCC isnt engaged anyhow on a hill, so im guessing you lost the gear. If you noticed a big jump in RPM, it was probably stuck in 3rd. This could be mechanical, or it could be the PCM thinks the trans is getting hot, so goes into limp mode. TCC lock-up failure is less obvious, a smaller bump in RPM. However, this situation can lead to overheating and eventual torque converter or transmission failure. Often you will see a code when TCC doesn't lock-up. If not, I don't think most drivers would notice unless you look at the tach.

When this happened, how fast were you going? How long of a trip was it? Any firm shifting? Ever happen before? Does OD come back the next time you drive the car? Any SES lamp?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
Back to top Go down
http://www.cardomain.com/ride/657082/4
Sponsored content




95 Riv Overdrive Empty
PostSubject: Re: 95 Riv Overdrive   95 Riv Overdrive Empty

Back to top Go down
 
95 Riv Overdrive
Back to top 
Page 1 of 1
 Similar topics
-
» Toyota 70 series overdrive
» Greaseless weights
» Twitter rumour mill in overdrive
» overdrive for 70 series

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   Supercharged 3800 Tech :: Series I Engine & Transmission-
Jump to: