High A/T oil temp
#1
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
High A/T oil temp
Just recently got the 4Runner back on the road and on just a short trip 35 miles, flat level highway @ 65 mph, 40F outside temp, Cruise off, ECT off and OD off, the "AT high temp light" comes on. The truck shifts and accelerates better than it has in years. Any ideas???
A340H rebuilt just installed 178 miles ago, new fluids, Toyota transmission cooler, fluid level and color good, no codes.
A340H rebuilt just installed 178 miles ago, new fluids, Toyota transmission cooler, fluid level and color good, no codes.
#2
Contributing Member
Join Date: Dec 2005
Location: Los Osos, CA (we can't agree on crap!)
Posts: 2,124
Likes: 0
Received 0 Likes
on
0 Posts
OD off @ 65 for 35 miles pushing 33's could do that. I have an aux. tranny cooler and if I did that I would definately be pushing at least 230degrees maybe more on my gauge. Once OD kicks in, the temp drops off real fast.
#3
Registered User
Join Date: Apr 2006
Location: Vancleave, Mississippi
Posts: 1,368
Likes: 0
Received 0 Likes
on
0 Posts
when highway driving at any speed over 45mph always have your OD on! It lowers your RPM's significantly. How many rpm's were you spinning at 65mph? My stuck-open egr valve caused my Torque converter to not lock up leaving me at almost 4k rpms at 80mph. My light came on after about 30 minutes of driving at this many rpms. its simply too much.
#5
Registered User
Join Date: Jan 2007
Location: Tucson, AZ
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
OD off? You should probably keep the Over Drive on when you are driving at high speeds. You were probably revving pretty high when you had the overdrive off which might have caused your transmission to run a little harder.
Trending Topics
#8
Registered User
Join Date: Apr 2006
Location: Vancleave, Mississippi
Posts: 1,368
Likes: 0
Received 0 Likes
on
0 Posts
#9
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
At 65mph she's running 3600 RPM's, sure I typically use OD on the highway for a long cruise but 35 miles is more of a sprint. I could understand pushing over 4K, but at 3.6K on a flat open highway your just rolling along. There's got to be a better reason, been runnig that small stretch of highway for 10 years without the OD and have never had the temp light even blink.
#11
Contributing Member
Join Date: Dec 2005
Location: Los Osos, CA (we can't agree on crap!)
Posts: 2,124
Likes: 0
Received 0 Likes
on
0 Posts
At 65mph she's running 3600 RPM's, sure I typically use OD on the highway for a long cruise but 35 miles is more of a sprint. I could understand pushing over 4K, but at 3.6K on a flat open highway your just rolling along. There's got to be a better reason, been runnig that small stretch of highway for 10 years without the OD and have never had the temp light even blink.
Last edited by slosurfer; 02-21-2007 at 06:14 PM.
#12
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
I can't agree on the "dumb" comment, mainly because OD is for sustained highway speeds and on this stretch of road unfortunatly your lucky to have an average speed of 50. The speed limit is 65 but I don't believe OD was designed to assist the tranny jumping from 45 to 65 and back over a distance that small. I would think it would be as bad as leaving it in OD in town. Correct me if I'm wrong, I don't think i'm dumb but it's possible i'm uninformed.
#13
Contributing Member
Join Date: Dec 2005
Location: Los Osos, CA (we can't agree on crap!)
Posts: 2,124
Likes: 0
Received 0 Likes
on
0 Posts
Do trannys have any type of "break in" period like a rebuilt motor would? If so, OD off, those rpms, pushing 33's, and for that long?!!! That may be the problem.
#14
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
Thanks slosurfer, that does make some sense and the temp gauge is a great idea. now could someone provide some insight on OD with constant highway speed vs varible speed.
#15
Contributing Member
Join Date: Dec 2005
Location: Los Osos, CA (we can't agree on crap!)
Posts: 2,124
Likes: 0
Received 0 Likes
on
0 Posts
I can't agree on the "dumb" comment, mainly because OD is for sustained highway speeds and on this stretch of road unfortunatly your lucky to have an average speed of 50. The speed limit is 65 but I don't believe OD was designed to assist the tranny jumping from 45 to 65 and back over a distance that small. I would think it would be as bad as leaving it in OD in town. Correct me if I'm wrong, I don't think i'm dumb but it's possible i'm uninformed.
#16
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
I don't know about a break in period, my concern is that the reason for OD is an additional gear for "maintained" highway speed. Should I use OD at an inconsistant highway speed, wouldn't it be like not down/up shifting with a standard, wouldn't your fuel savings be tossed anyway?
Last edited by Dublin; 02-21-2007 at 06:26 PM.
#17
Contributing Member
Join Date: Jan 2007
Location: SRQ, FL
Posts: 1,521
Likes: 0
Received 0 Likes
on
0 Posts
what gears are you running? 5.29's would prolly make it a bit easier to drive in overdrive at highway speeds.
I'm currently cursed with 4.56 stockers with 31s, and it's HORRIBLE. 5.29's go in sunday, but i'm thinkin gears and a good cooler could help you a lot.
I'm currently cursed with 4.56 stockers with 31s, and it's HORRIBLE. 5.29's go in sunday, but i'm thinkin gears and a good cooler could help you a lot.
#20
Contributing Member
Thread Starter
Join Date: Feb 2004
Location: Appleton, Wi. USA
Posts: 903
Likes: 0
Received 0 Likes
on
0 Posts
OD in town? I would think they wouldn't even call it OD and reconfigure the shift points. How about some Tech input, I definatily don't want to risk a toasted slush box.