The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - DOT 4 fluid for clutch- why?

4793 · 09-07-2023, 09:40 PM

My avatar truck is an '02 K2500 with the 8.1/ 6spd manual. Noticed the other day the clutch reservoir was on the low side and *then* I noticed the cap said "DOT 4 only". I just had DOT 3 brake fluid on hand so I did a little research and made a phone call to a trusted mechanic- long story short I ended up going to town for a bottle of DOT 4. The brake system in this truck takes DOT 3 and I end up wondering why the clutch wouldn't use the same fluid?

(if this has been covered somewhere, apologies, the search results were inconclusive)

09-07-2023, 09:40 PM	#1
4793 Registered User Join Date: Dec 2022 Location: rural Iowa Posts: 21	DOT 4 fluid for clutch- why? My avatar truck is an '02 K2500 with the 8.1/ 6spd manual. Noticed the other day the clutch reservoir was on the low side and then I noticed the cap said "DOT 4 only". I just had DOT 3 brake fluid on hand so I did a little research and made a phone call to a trusted mechanic- long story short I ended up going to town for a bottle of DOT 4. The brake system in this truck takes DOT 3 and I end up wondering why the clutch wouldn't use the same fluid? (if this has been covered somewhere, apologies, the search results were inconclusive)