1990 toyota corolla 1.8d transaxle fluid

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Jul 22, 2020
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What is the difference between a 80w90 gl4 multigrade mechanical transmission case oil and a sae 80w90 gl5 mechanical transmission case multigrade oil? What mechanical transmission oil would you recommend for a corolla 90 diesel 1.8d 1c engine with mechanical transmission and integrated differential?

these are the oils available to me:

liquimoly gear oil with gl4 sae 85w-90 specs
shell spirax s4 ax 80w90 with gl4 specs

thanks

jorge
 
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