Trans overheating?

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alternative
Posts: 41
Joined: Tue May 10, 2022 10:51 am
Your car is a: 1980 Fiat 124 Spider Fuel Injected

Trans overheating?

Post by alternative »

After a few minutes of normal driving and shifting (by my standards at least, shifting around 3000rpm), the area surrounding the shifter gets increasingly hot, to the point that I can feel the heat on my leg while pressing the accelerator or brake. A couple of other forums (surrounding other cars) suggest that this might be some exhaust manifold heat making its way through the boot. Could anyone validate this claim or tell me if this means my trans is overheating?
18Fiatsandcounting
Posts: 3798
Joined: Fri Mar 15, 2019 11:23 pm
Your car is a: 1969 and 1971 124 spiders
Location: San Francisco Bay Area

Re: Trans overheating?

Post by 18Fiatsandcounting »

It's probably a combination of exhaust pipe heat and transmission heat, although it doesn't mean that your transmission is overheating. These transmissions do tend to radiate a lot of heat up the transmission tunnel and into the center console area. It's not unique to Fiats, either. Make sure you're not low on transmission oil.

Do you know that all of the parts in the shifter area are present in your car? There should be a metal oval cover plate for the opening in the transmission tunnel with insulation around its rim, then a rubber boot around the lower shifter that slips around the transmission housing extension, sometimes with foam rubber insulation, then your console cover plate that has a metal bottom and a wood top. Plus the shift boot and shifter extension and knob. If any of these are missing, heat can come up through the tunnel. All Fiat spiders tend to do this, within reason of course.

-Bryan
alternative
Posts: 41
Joined: Tue May 10, 2022 10:51 am
Your car is a: 1980 Fiat 124 Spider Fuel Injected

Re: Trans overheating?

Post by alternative »

Thanks for the quick answer, although could you tell me how to check the trans oil? I haven't been able to find a way yet.
Nut124
Posts: 748
Joined: Wed Oct 25, 2017 6:39 pm
Your car is a: 1978 124 Spider 1800

Re: Trans overheating?

Post by Nut124 »

To check the trans oil level, locate the fill/check plug on the right side, middle of the trans, about 2" up from the bottom cover. This is a 17mm hex nut plug.

Remove the plug and feel with you finger. Oil should be level with bottom of the plug hole, or just below it.
TX82FIAT
Posts: 1814
Joined: Mon May 03, 2010 11:04 am
Your car is a: 82 Fiat Spider 2000 CSO
Location: San Antonio

Re: Trans overheating?

Post by TX82FIAT »

+1 on these transmission running hot. I added some insulation around the transmission and an aluminum trans oil pan with fins for added cooling. Make sure you use GL1. This is a source of debate. These cars need the thick honey GL1 trans oil.
Buon giro a tutti! - enjoy the ride!

82 Fiat Spider 2000
03 BMW M3
07 Chevy Suburban
Nut124
Posts: 748
Joined: Wed Oct 25, 2017 6:39 pm
Your car is a: 1978 124 Spider 1800

Re: Trans overheating?

Post by Nut124 »

TX82FIAT wrote:+1 on these transmission running hot. I added some insulation around the transmission and an aluminum trans oil pan with fins for added cooling. Make sure you use GL1. This is a source of debate. These cars need the thick honey GL1 trans oil.
Where did you find that finned alu oil cover?
TX82FIAT
Posts: 1814
Joined: Mon May 03, 2010 11:04 am
Your car is a: 82 Fiat Spider 2000 CSO
Location: San Antonio

Re: Trans overheating?

Post by TX82FIAT »

A German company about 7 years ago. Just looked on the site and did not see the aluminum trans pan. www.spider-point.com.
Buon giro a tutti! - enjoy the ride!

82 Fiat Spider 2000
03 BMW M3
07 Chevy Suburban
AS1967
Posts: 5
Joined: Sun Jun 26, 2022 3:05 pm
Your car is a: 1967 124 Sport Spider

Re: Trans overheating?

Post by AS1967 »

You might want to have a look what these German guys say. It sounds interesting and makes sense.

https://shop.strato.de/epages/62201507. ... 0magnSt%22

http://www.fiat124spiderservice.de/html ... wanne.html
18Fiatsandcounting
Posts: 3798
Joined: Fri Mar 15, 2019 11:23 pm
Your car is a: 1969 and 1971 124 spiders
Location: San Francisco Bay Area

Re: Trans overheating?

Post by 18Fiatsandcounting »

AS1967 wrote:You might want to have a look what these German guys say. It sounds interesting and makes sense.

https://shop.strato.de/epages/62201507. ... 0magnSt%22

http://www.fiat124spiderservice.de/html ... wanne.html
That is interesting. I always thought the transmissions in all my Fiat spiders shifted a bit harder when they were really hot, but I always figured it was my imagination.

Thanks for those links. Note that the finned oil pans are not in stock, so you need to order and then wait until they do a production run.
-Bryan
Nut124
Posts: 748
Joined: Wed Oct 25, 2017 6:39 pm
Your car is a: 1978 124 Spider 1800

Re: Trans overheating?

Post by Nut124 »

AS1967 wrote:You might want to have a look what these German guys say. It sounds interesting and makes sense.

https://shop.strato.de/epages/62201507. ... 0magnSt%22

http://www.fiat124spiderservice.de/html ... wanne.html
Thanks for sharing!

I actually just ordered one from here:

https://shop.arnold-classic.com/en/4663 ... ider/coupe

The German one looks nicer, does it?
18Fiatsandcounting
Posts: 3798
Joined: Fri Mar 15, 2019 11:23 pm
Your car is a: 1969 and 1971 124 spiders
Location: San Francisco Bay Area

Re: Trans overheating?

Post by 18Fiatsandcounting »

Now you got me wondering if it's possible to add some cooling fans around the transmission, like one or two miniature 12V computer fans. Turn them on when things heat up. Could it help? All you need to do is get air circulating around the transmission housing.

I'm sure racing folks in general (not just Fiat) have had to deal with hot transmissions.

-Bryan
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